Using An Open Map By: Joseph Elfelt Last update
Contents
1. with a common name e subpremise indicates a first order entity below a named location usually a singular building within a collection of buildings with a common name postal code indicates a postal code as used to address postal mail within the country natural feature indicates a prominent natural feature airport indicates an airport park indicates a named park point of interest indicates a named point of interest Typically these POI s are prominent local entities that don t easily fit in another category such as Empire State Building or Statue of Liberty Source https developers google com maps documentation geocoding c Searching coordinates Gmap4 supports searching on the following types of coordinates In order to get correct results the coordinates must be in the WGS84 datum Latitude longitude e decimal degrees dd dddddd e degrees and decimal minutes dd mm mmm lt Popular for geocaching degrees minutes seconds dd mm ss UTM Universal Transverse Mercator e USNG U S National Grid Standard for federal search and rescue missions MGRS Military Grid Reference System Most reasonable ways to write coordinates will work If you search on UTM USNG or MGRS then the coordinate format will be changed to the same type of coordinate you used in your search Also a coordinate grid will be displayed If you search on a coordinate and then look at the list of hits2. plus one or more of your IP address cell towers RFID WiFi and or Bluetooth 10 Tips for embedding Gmap4 The feature Menu gt Embed this map will display the html code for making an iframe that is 500 pixels by 500 pixels Gmap4 is designed to work correctly and look good down to a size of 400 by 400 When using Gmap4 in an iframe a good practice is to include a link below the iframe that will display the same map full screen That link is included in the html code that is displayed You may need to tweak this html code so it looks good on your site 11 Tips for flying in 3D Note Google Earth 7 did not work for me when I tried it I uninstalled that program and installed Google Earth 6 2 which works fine In order to use the Earth view your browser must have the Google Earth plug in installed This browser plug in is not the same thing as the standalone Google Earth application You also need a broadband internet connection and a reasonably modern computer Since Earth view uses a large amount of data you may have a better experience if you can use a computer that is hard wired to the internet instead of one with a wireless connection And since this feature works anywhere in the world you might find the search feature Menu gt Search of Gmap4 to be a useful way to display a map where you wish to start flying After you learn to use the right click hold and shift left click drag controls see below then you ca
3. the first item in that list will place a marker at that exact coordinate The other items in the list were generated by Google s geocoder Google states Reverse geocoding is an estimate The geocoder will attempt to find the closest addressable location within a certain tolerance if no match is found the geocoder will return zero results i Searching on latitude longitude coordinates Latitude longitude coordinates west of the principal meridian includes North America and South America must have a longitude that is either negative or marked with an W Coordinates east of the principal meridian must have a longitude that is either positive or marked with an E Coordinates south of the equator must use a minus sign or S with the latitude Coordinates must be balanced If your latitude is degrees minutes seconds then your longitude must also be degrees minutes seconds even if the seconds are zero Allowable formats for searching on latitude longitude coordinates include the following Decimal degrees 48 111962 121 115385 N48 111962 W121 115385 48 111962N 121 115385W Degrees and decimal minutes e N 48 6 718 W 121 6 923 lt Popular geocaching format e N48 6 718 W121 6 923 lt Popular geocaching format Degrees minutes seconds e 48 6 43 121 6 55 e 48d 6m 43s 121D 6M 55S e 48 6 43 121 6 55 e 48 06 43 121 06 55 ii Searching on UTM coordinates Note that you do need to include the UTM zon
4. Gmap4 By Joseph Elfelt Last update to this file February 3 2015 For more documentation see the Gmap4 Help page Also see the What is new page Look for the tag mew Table of contents Intt OC EON 1a aue CE EHI ACE CER AGI a EAA RA Kd e dace oa CER Ee AE e 2 Goole controls i oe Ced t ce SV e 3d bbc Ao TRE ed Ce EEEN RE 2 Mo s controls es x p v EVE RR ERA REN NX RUEYANE RUE ENDE VERE YEN SE BO 2 Basemap OM Senay dae ERR EE iene Id EROR PY EOS ZR d thn meas Conan UR E 2 Menu DUO iso eic ce eC OR E CX CIR BAAR ERT EER EERE BRET 3 USNG and MORS coordinates 43 E Ta da Ee FAT XORERRAEECLHR PROPERE AR dS 4 Tips for scare hings a oceano de ee athe do CR edi CIRC do SEDE db Sou Di ed 5 Searching addresses cs acea dock Rok be Repo A GER OR GU ROC Ce RR GER RR ro 5 Searching place fiae esee es quad bo TOE EErEE rE ROHR eed E cR P qhag 6 Searching coordinates 4 6 44 425 siet ba a OUS dnt S d C pog ded edu 6 Tips for transparent overlays NEW 6 cece eee 9 Tips for mobile users and the My location feature 0 0 0 eee eee eee 10 Tips for embedding Gmap4 usse re CEDE RR ERA RE EA dex ER e enes 12 Tips for tying m 3D aucadtexs 321979 223449 x59 eU ees qi p COP YR CIS SE 12 Tips for using directions 4rucgocece ber deo e CIE Rl ahead eae Oude e aeter doa oras 17 udo rr 18 Miscellaneous technical trivia ccce RR RII 18 1 Introduction So you are looking at a Gmap4 map Now what This documen
5. a file Label Streetview Crosshair Map tilt Printing Tips Viewing Tips Full screen Help About Scroll interface Property Line Maps Donate Display a link that will produce the same map you see on your screen Display html code that you can use to embed this map info a web page Search by address place name or coordinates Get draggable directions Do trip planning or make a custom map Save your work as a GPX file delimited text file or a map in a link Change the amount of hill shading for the t4 Topo High basemap Choose the coordinate format Toggle a display of the magnetic declination for the center of the map Toggle most data files Toggle any map labels Toggle whether the streetview symbol is displayed Toggle whether the crosshair at the center of the map is displayed Toggle whether the Google aerial will tilt as you zoom in on certain urban areas Tip If you are displaying any grid lines on the map and they do not look right when the aerial tilts then use this feature to turn off the tilt so your view becomes straight down Display some printing tips Display some tips for viewing the map See the same map full screen Useful if you are looking at a small embedded map Display the Gmap4 Help page Display the Gmap4 About page Change to the scroll interface Mobile devices automatically use this interface The developer of Gmap4 is also the developer of PropertyLineMaps com Visi
6. at is on has a number by its name A higher numbered layer is on top of any lower numbered layers To move a layer that is on up to the top of the stack turn that layer off and then back on You can click most GIS symbols and a popup will appear with all the attribute data the GIS server has for the thing that you clicked Being able to see all the attribute data is one of the best things about working with GIS data Some GIS layers have attribute fields that contain links which lead to more information about the thing that you clicked Be patient Some GIS servers will take a few seconds to respond Three things to keep in mind You can only display attribute data for the GIS overlay layer that is on top in other words the layer with the highest number When the popup is on the map showing attribute data or a message then you cannot click the portion of the map that is below the popup You need to either close the popup or drag the map When a Gamp4 map can show overlay layers in addition to the USA weather radar and contour lines then you cannot doubleclick on the map to center the map at that spot Doubleclick is disables so it does not interfere with the ability to do a single click and get GIS attribute data To re center the map you can do click hold drag To see just the GIS overlay layers that are on without any basemap change the basemap to All white basemap You can make some really interestin
7. ay coordinates Right click anywhere to display the coordinates of the point clicked using the WGS84 datum The coordinates will be displayed in all the various formats the Gmap4 understands 4 Basemap button The button is located at the upper right corner on desktops laptops and the lower right corner on smartphones and other mobile devices This button always displays the name of the current basemap The basemap button opens a menu that lets you change the basemap and turn GIS overlay layers on and off Basemap name Content Map Street map from Google Satellite Aerial photo from Google Hybrid Aerial photo plus street names and other labels NAIP Aerial Aerial photo USA t1 Terrain Terrain from Google default t2 MyTopo Topographic map from MyTopo USA maps are 1 24 000 Canada maps are 1 50 000 t3 Topo USGS Topographic map from USGS via The National Map t4 Topo High Topographic map from CalTopo com amp USGS High t5 Canada Topographic vector maps for Canada t6 Topo ESRI USA Topographic USA t7 Topo ESRI World Topographic Worldwide t8 Topo OSM Cycle World Topographic Worldwide osm Open Street Map Open street map Earth View the map with the Google Earth browser plug in You can fly over the map in 3D Amazing See flying Tips below All white basemap Select this basemap to see just data from any transparent overlays that are on New The above basemaps are built in to Gmap4 and th
8. d check this list http en wikipedia org wiki List_of smartphones using GLONASS Navigation You can test the location accuracy of the GPS in your smartphone or other mobile device You need an app that lets you record your track and then email that track to yourself as either a KML or GPX file Gaia GPS is a popular app which works on both Apple and Android devices Here are the steps 11 l Load the Gaia GPS software and learn how to use it to record your track 2 Walk somewhere that you can see on the google aerials This could be along a sidewalk or on a marked line around a sports field or any other line of travel that you can see on the google aerial Email your track to yourself as either a GPX or KML file Open that email on your computer and save your file Place your file online Make a Gmap4 link to display your file Compare the location data produced by the GPS chip in your device to the real location of where you walked as shown on the google aerial DIN CU eee CA If you need help placing your file online or viewing your file with Gmap4 then please visit the Gmap4 Help page and download the pdf file Working With Files Note Native apps like Gaia are different than Gmap4 when it comes to determining your location Native apps only rely on the GPS chip for location data Browser apps like Gmap4 get their location data from the browser software Your mobile browser determines your location by using the GPS chip
9. e ridge Tickles doesn t it Even if the control disappears behind some land as you orbit just keep a steady hand on the controls of your personal jet pack and eventually the right click control will re appear Here is a tip for flying around obstructions In addition to dragging the cursor straight down a small amount also move it to the left or right a bit Your flight path will now curve around to the right or left while still moving you closer to the right click control The key thing to remember about the right click control is that its main purpose is to let you fly toward the control Therefore to fly down to a lower altitude you should right click a spot on the map that appears to be below your current elevation By contrast to fly along more or less at your present altitude then try to right click something on the far horizon Shift left click control The same control symbol appears on the screen that is used by the right click control However this control affects your flight in a different manner NOTE This control it is Google s code not mine might have a bug You have to continue dragging your cursor for the control to work Drag down You fly straight down and the view tilts so you look up more The horizon will come in to view Drag up You fly straight up and your angle of view tilts down Drag left right Same as right click You fly an orbit around the control and your view remains fixed on the control Comparison
10. e in your search The UTM zones are numbered 1 through 60 Note The only letter allowed in the UTM zone is N north of equator default or S south of the equator Many people are confused on this point Allowable formats for searching on UTM coordinates include the following e LIN 384381E 4048885N e LIN 384381E 4048885N e LIN 384381 4048885 11 384381 4048885 north hemisphere is assumed iii Searching on USNG or MGRS coordinates Since both USNG and MGRS coordinates specify an area or box the map will be centered at the center of that box Allowable formats for searching on either USNG or MGRS coordinates include e 10T grid zone 10T ET 100 000 meter box e JOT ET 47 10 000 meter box 10T ET 49 72 1 000 meter box e 10T ET 496 723 100 meter box e 10T ET 4962 7237 10 meter box e 10T ET 49622 72376 meter box 1OT ET 496 723 100 meter box e OT ET 496 723 100 meter box JOTET 100 000 meter box JOTET47 10 000 meter box JOTET4972 1 000 meter box JOTET496723 100 meter box 10TET49627237 10 meter box e 10TET4962272376 meter box Note Since the earth is more or less round some of these grid boxes are not fullsize In this case the map will still be centered as though the grid box is full size If 1 the grid box you search for is not full size and 2 the map is centered outside of the grid box you searched for then you will see a warning message Compare these two searches 8 Tips for transparent ove
11. eir names appear in bold type when you open the basemap menu If the map you are looking at has additional basemaps with data coming from a GIS server then those basemap names will be at the bottom of the list in normal type Clicking the basemap button also lets you turn on off any GIS overlay layers For more information please see the section on GIS overlays below In some places the NAIP aerials provide a better image than the Google aerials Also the NAIP aerials are in the public domain and are hosted on a federal server It is a violation of Google s terms of service to take a screenshot of an aerial image that Google is hosting On the other hand if you zoom way in then the resolution of the NAIP aerials is not as good as the Google aerial The NAIP aerials only cover the USA and this federal server can be slow at times The Earth option is not displayed when you use Gmap4 on any mobile device iPad phone etc This feature uses the Google Earth browser plugin and that plugin does not work on mobile devices 5 Menu button Here is a list of the options you will see under the Menu button on a desktop or laptop A few options are not available on smartphones or other mobile devices Terms of service Display the Gmap4 terms of service Gmap4 Homepage Display the Gmap4 homepage Link to this map Embed this map Search Directions Draw and save Hill shading UTM USNG LatLng Declination Dat
12. fault dd mm mmm dd mm ss UTM USNG and MGRS If you change the coordinate format via the Menu button then the next time you touch the location symbol the new coordinate format you selected will be used to show your location There are two ways to use the My location feature First if you are using a smartphone tablet or other mobile device and touch Menu gt My location then Gmap4 will use the geolocation feature provided by your browser to try and center the map at your position If your mobile device has a GPS chip and the GPS is on and you give permission then your browser will use the GPS to help determine your position Your 10 browser might also use one or more of your IP address cell towers RFID WiFi and or Bluetooth Second adding amp mylocation on to a Gmap4 link will automatically show your location when the map opens in your browser Remember it is your mobile browser that determines your location Your browser then filters that location data in strange mysterious and largely undocumented ways before sending location coordinates to Gmap4 No doubt different browsers and different versions of the same browser work differently in this regard All Gmap4 does is display a red circle at your location as determined by your browser software If you touch the location symbol red circle then a popup appears that shows the coordinates at the center of the symbol and an accuracy distance There is sup
13. g map views with this technique http www propertylinemaps com p public land map html If you do not see your state yet more states will be added as time allows For plenty of example maps and plain language instructions please see GIS Help page http www mappingsupport com p help files gmap4 gis help html GIS Viewer page http www mappingsupport com p gmapd4 arcgis layers on google maps html 9 Tips for mobile users and the My location feature If you are going to use this feature then be sure to turn on the GPS feature in your smartphone or other mobile device Also if you are in an area where there might be wi fi signals then be sure to turn your wi fi on as well Even though you likely will not be connecting to those wi fi networks they still might be used to help determine your location When you start the My location feature your browser might ask you for permission to share your location That permission only applies to the Gmap4 program Gmap4 does not save your location or share it with anyone The only thing Gmap4 does with your location is show it on your screen You can use your browser s settings to cancel that permission at any time The position of the red circle on the map is automatically updated as you move This update happens at least once every 5 seconds When you touch the location symbol the current coordinate format is use to display your position The coordinate formats are dd dddddd de
14. l you see Guitar Lake and the JMT way down below Keep rotating until these features are about in the middle of your screen and then release the mouse button Now the fun part Point to the mountains in the distance and right click hold Move your cursor straight down a very small amount You are now flying toward the control and watching the JMT pass beneath you To fly in reverse move the cursor straight up a very small amount Wait there s more You can also fly in an orbit around the right click control Right click hold the map and then drag the cursor a very small amount either left or right 14 If you do this just right then you will fly in an orbit around the control and with your direction of view fixed on the control This will take some practice At first you will most likely fly in a spiral since you will be orbiting and also moving closer to or father from the control symbol The secret is to drag the cursor up down just a bit so your distance to the control symbol remains the same as you fly in a circle with your view always on the control Now let s say you are flying along a valley at an elevation that is below the top of an adjacent ridge You decide to right click hold on a peak along that ridge and then orbit around that peak But remember the ridge and it s peak are higher than you are No worries As you fly in your orbit you will magically be teleported through the earth and emerge safely on the other side of th
15. n put the map into Terrain 12 view search for Montreux strap on a jet pack and fly at low altitude through the Swiss Alps Wheeeeeeee Earth view displays three controls in the upper left corner of the map Move your cursor over any control and they all become active From top to bottom these controls are called Look Move Zoom Want to slow down the action while you learn to fly If you place your cursor very close to the center of the Look control or the Move control and then click hold then those controls operate more slowly Look control This control does not change your position in the sky When you click hold the Look control think of yourself as hovering in space and looking up down and around Click hold cursor location Action Directly above Look center Tilt the view up Directly below Look center Tilt the view down Directly left of Look center Rotate the view clockwise Directly right of Look center Rotate the view counter clockwise If you place your cursor in between these four main positions then you can get a dizzying combination of actions Move control This control flies you through the sky while maintaining your altitude It also maintains the direction and angle of your view Click and hold close to the center of the control and in the direction that you want to fly While flying you can move your cursor around inside this control to change the direction that you are flying Note that this control does n
16. o the right of this control 18
17. of the last two controls Right click Orbit while flying closer in and further away Shift left click Orbit while flying up and down CTRL left click control If you open this control and continue holding the mouse button down then you can drag the cursor and change your view just like the Look control In other words you can hover at the same spot in the air and look up down and around 15 Keyboard shortcuts n Look north u Look straight down r Look straight down with north at the top of your screen If your mouse has a scroll wheel you can tilt the view by pressing the SHIFT key and scrolling DOWN to tilt the Earth to top down view or scrolling UP to tilt the Earth for horizon view Here is a page from Google with the keyboard shortcuts for the regular Google Earth program Some of them do not work with the Google Earth browser plug in which Gmap4 uses http earth google com support bin static py page guide cs amp guide 22358 amp topic 22362 Sources for more information Video on using the Look Move Zoom navigation controls http earth google com support bin static py page guide cs amp guide 22358 amp topic 22361 amp answ er 148186 navcontrols Tutorial on using the Look Move Zoom navigation controls http earth google com support bin answer py answer 176674 Information on the Google Earth browser plug in http www google com earth explore products plugin html Background on the Earth feature Below i
18. om After all the Trimble company they own MyTopo allows Gmap4 as well as other software to show you the MyTopo topographic maps online at no cost We should return the favor by giving them our business when we need to purchase paper maps You can print maps including topographic maps right from your browser None of the Gmap4 code is involved in this process This is all handled by Google s code and your browser Note If your map had the Gmap4 search bar open then you might need to close that search bar before trying to print In Firefox and IE click File gt Print Preview A preview screen should appear that shows some controls at the top and all or part of your map Use those controls to 1 Display the map in landscape mode 2 Adjust the print scale so the map nicely fills the page If you want the current magnetic declination to appear on the printed map then click Declination The declination will appear in the lower left corner 14 Miscellaneous technical trivia a Map pan zoom or zoom only control This control lives in the upper left corner of the map If the map fills your screen then you likely will see a big control with both pan and zoom ability But if you shrink the map so it is less then about 700 pixels wide then you will see a much smaller zoom only control This switch is based on map width and not map height in order to maximize the amount of space available for a map name Map names appear t
19. oogle document that sheds light on the kinds of place names that should be searchable e street_address indicates a precise street address route indicates a named route such as US 101 intersection indicates a major intersection usually of two major roads political indicates a political entity Usually this type indicates a polygon of some civil administration country indicates the national political entity and is typically the highest order type returned by the Geocoder administrative area level 1 indicates a first order civil entity below the country level Within the United States these administrative levels are states Not all nations exhibit these administrative levels e administrative area level 2 indicates a second order civil entity below the country level Within the United States these administrative levels are counties Not all nations exhibit these administrative levels e administrative area level 3 indicates a third order civil entity below the country level This type indicates a minor civil division Not all nations exhibit these administrative levels colloquial area indicates a commonly used alternative name for the entity locality indicates an incorporated city or town political entity sublocality indicates an first order civil entity below a locality neighborhood indicates a named neighborhood premise indicates a named location usually a building or collection of buildings
20. ot change the direction you are looking This means that you can easily look to the north while you fly to the south You can also fly by simply left click hold the map and dragging it Zoom control This control zooms in out based on the center of the map Think about drawing a line between your position in the sky and the center of the map If you zoom in then this control flies you closer to the ground along that line And if you use this control to zoom in all the way then as you approach the ground the view will tilt up Think of this flight path like a plane coming in for a landing Example To fly along through a valley you could first look down zoom in part way tilt the view back up with the Look control and then use the Move control to fly If you want to fly along at a lower altitude then repeat these steps 13 Right click control coolest way to fly To activate this control right click hold anywhere on the map With this control you can fly in three dimensions CAUTION This control is highly sensitive A very small change in the position of your cursor can have a large effect on the map To see how this control works please open the following map This map displays a KML file showing the approximate location of the John Muir Trail JMT in California Thanks to http www jmt hiker com for posting that file The map is zoomed in with Mt Whitney at the center and the JMT is bright green http www mappingsupport com
21. p gmap4 php q http www jmt hiker com extras John Muir Trail kml amp 11 36 578541 118 292112 amp t t2 amp z 14 After the map opens click MyTopo gt Earth Wait a couple seconds for the labels to appear Place your cursor a bit to the left of Mt Whitney and right click hold to open the control Keep holding the right button down and just barely move the cursor straight down on your screen You should now be flying toward the control and losing altitude as you get closer to it As you approach the summit of Mt Whitney you can right click closer to the summit to refine your flight path so you are heading right for the summit As your flight path gets really close to the summit your view will automatically tilt up When you can see the horizon release the mouse button Double click the N that is part of the Look control Your view rotates so you are now looking due north Place your cursor a very small amount to the right of the center of the Look control and click hold You are now standing on the summit of Mt Whitney actually you are likely hovering in the air close to the summit and shuffling your feet as you keep turning to the right admiring the view As you keep turning in place you can move the cursor a very small amount up down so the horizon always remains in view When the view has rotated so you are looking south you will see the green JMT descending down the ridge and the name Mt Muir Keep rotating the map unti
22. posed to be a 95 probability that your true location is within that distance of the coordinates that are displayed Caution The GPS in your smartphone or other mobile device might only be accurate to about 50 feet For more details keep reading Let us assume that your smartphone has a GPS chip and you have a GPS app on your phone and you are in a remote area where there are not any cell towers or WiFi Of course Gmap4 will not work on your phone at this location since you cannot get online If your smartphone or tablet etc does not have one of the following technologies then the best location accuracy your phone will give you is about 50 feet 15 meters WAAS This technology corrects the GPS data from the satellites for various problems including those caused by the data stream passing through the ionosphere and atmosphere Bad news Smartphones tablets and other mobile devices do not have this technology Also this technology only covers the USA Handheld GPS units do have WAAS e GLONASS This technology is Russian GPS satellites Many but not all smartphones and other mobile devices can receive data from both the USA satellites and the GLONASS satellite If your mobile device can receive data from both types of satellites then in good conditions your location accuracy should be around 15 feet 4 5 meters The iPhone 4s and newer models include GLONASS For Android devices you can consult your user manual or you coul
23. r search request the map will automatically resize to contain all the markers that you ask to have placed on the map If you rest the cursor briefly on a marker then you will see the same text that is shown in the list of hits If you are looking at a topographic map when you ask to have your search results displayed on a map then the map will change to the Google Terrain view if 1 any marker on the map lies outside of the USA Canada combined or 2 the map has to zoom out to zoom level 9 or less in order to include all the markers you requested To find out the current zoom level right click the map a Searching addresses Gmap4 sends your search request to Google where it is processed by a geocoder Hopefully this geocoder sends back one or more coordinates Since Google s geocoder performs a special type of search you will have better results if you experiment with it a bit by trying different searches and looking at the list of hits Gmap4 shows you all the hits that are returned by Google s geocoder Here is a statement from Google about searching on addresses Generally addresses are returned from most specific to least specific the more exact address is the most prominent result Note that we return different types of addresses from the most specific street address to less specific political entities such as neighborhoods cities counties states etc b Searching place names Here is a quote from a G
24. rlays NEW Gmap4 can display a vast amount of data as transparent overlays on top of any basemap This type of data is hosted on GIS Geographical Information System servers most of which are operated by governmental agencies from federal to local Gmap4 displays this data directly from the GIS server to you Anyone willing to read and follow some simple directions can make a Gmap4 link to display the GIS data they want to see To display the list of available GIS overlay layers click the button that always displays the name of the current basemap The basemap button is next to the Menu button Desktop laptop When you click the basemap button two drop down menus appear labeled Overlays and Basemaps Mobile After touching the basemap button scroll down for the Overlay section Two GIS overlays are hard coded into Gmap4 USA weather radar This overlay looks the best when the map is zoomed out If there is a big weather event happening then the federal server hosting the radar data can become slow USA contour lines except Alaska Many people enjoy seeing the contour lines on top of the Google aerial This overlay only appears on the map if you are zoomed in a lot Zoom in so the scale at the bottom of the map says either 500 ft or 200ft Google has set this scale to metric Click on the scale symbol and it will change to feet miles instead of metric To turn a GIS overlay layer on or off click it A layer th
25. s a description of what happens under the hood when you ask to see the 3D Earth view of the map First Gmap4 checks to see if your system is compatible with the Google Earth browser plug in As of September 17 2011 Google says The Google Earth Plugin is currently supported on the following platforms Microsoft Windows XP and Vista Google Chrome 5 0 Internet Explorer 7 0 Firefox 3 0 Flock 1 0 Apple Mac OS X 10 5 and higher Intel Google Chrome 5 0 Safari 3 1 Firefox 3 0 Although the plugin and API may work correctly on other browsers that support NPAPI with npruntime extensions these browsers are not officially supported Source http code google com apis earth documentation index html If google decides that your system is not compatible then you see an informative message You can continue using all the other features of Gmap4 except the Earth view 16 Next Gmap4 checks to see if your system already has the Google Earth browser plug in installed If this plug in is installed then your screen should display the 3D Earth view along with any data such as a GPS track that Gmap4 was displaying If your computer system does not have this plug in installed then you will see a message containing that information and a link to Google where you can download the plug in if you decide to install it If you decide to install the plug in please follow the instructions in this message If you decide to not ins
26. t this website Display the Gmap4 Donate page 6 USNG and MGRS coordinates For more information on the U S National Grid USNG and Military Grid Reference System MGRS please visit the Gmap4 Help page and download the pdf file USNG and MGRS Coordinates 7 Tips for searching To open the search bar click Menu gt Search Type something you want to search for and press enter or click one of the buttons in the search bar In general you can search on A broad range of things related to addresses Certain kinds of place names Various kinds of coordinates WGS84 datum Pressing Enter after typing in the search bar is the same as clicking List If there is only one hit in response to your search then pressing Enter will display the map instead of displaying a list since the list only contains one hit If you click the Search amp Mark or Search button then you will see a map based on the first item in the list of hits If you searched on a coordinate then clicking one of these buttons will take you right there since the location of the coordinate will always be the first item in the list of hits However if you searched on a place name then the first item in the hit list may or may not be what you were searching for Maybe the item you were searching for is 3 on the list of hits or 4 or I you click an item in the list of hits then the map will center at that spot In response to you
27. t will show you the various things that you can do with that map p Google controls This section assumes you are looking at the map on a desktop or laptop Pan the map up down left right Use the control in the upper left corner See a streetview Drag the orange person symbol near upper left corner over to the street If the street displays a blue highlight then streetview images are available Here is some information from Google on how to use streetview http maps google com intl en help maps streetview learn using street vie w html Zoom Drag the marker on between the and near the upper left corner Scale The map scale is at the bottom near the right corner Google displays the scale in metric To change the scale to miles feet click the scale image 3 Mouse controls Pan the map Click hold drag Double click Center the map at that spot New Double click is disabled on maps that can show GIS overlay layers You will need to click hold drag the map to pan it Right click Display coordinates in various formats for the spot you clicked Also get directions to or from the spot you clicked Zoom Mouse wheel Note If you are looking at a map that is embedded on a webpage then whoever made that Gmap4 link might have disabled mouse wheel zoom This is done so the mouse wheel will continue to scroll the webpage instead of zooming the map In this case you will need to use Google s zoom control Displ
28. tall the plug in simply close the message window You can continue using all the other features of Gmap4 except the Earth view If you install the plug in and then later decide to uninstall it please do so as follows 1 Windows Select Start gt Programs or All Programs gt Google Earth gt Uninstall Google Earth Plug in 1 Mac Delete Library Internet Plug ins Google Earth Web Plug in plugin before restarting your browser After the plug in is uninstalled then 2 Close the browser if it is open 3 Open the browser 4 Clear the browser s cache Be careful that you only clear the cache You do not want to clear other items 12 Tips for using directions If you are already viewing an open Gmap4 map then to get directions right click either the start or end of your trip A popup will be displayed showing the coordinates for the spot you clicked in various formats At the bottom of that popup are buttons you can use for directions When the directions are displayed you can Drag the blue line and the text directions updates automatically To restore the original route and directions click the Get directions button Click any part of the written directions and a popup appears on the map at that spot Also you can form a link that will open Gmap4 with the directions sidebar already displayed and the location of the trip destination already filled in This is useful if you want to e mail or post a link so
29. that multiple people can get directions to a common meeting location To make this work your Gmap4 link must include 1 an amp ll parameter that is set to the latitude longitude of the destination and 2 the parameter amp directions on Here s an example The destination is the main trailhead for hiking up Mt Whitney in California http www mappingsupport com p gmap4 php 11 36 586962 118 239968 amp t tl amp z 13 amp directio ns on amp symbol pgs 17 Zooming the map out a bit and using the terrain view makes a pleasing map for directions The above link does not use the amp label and amp coord link parameters so they will have their default values of amp label off and amp coord latIng Also the amp symbol parameter was used to place a symbol at the center of the map to help people see the destination Do you want to place your own symbol at the center of the map and include a label with the symbol The absolute quickest easiest way is to learn how to make a delimited text file that Gmap4 can read If you do not already know the latitude longitude for your destination then try using Gmap4 s search feature and enter a town or place name that is close Then zoom pan the map and when you find it then point to it and right click You can copy the latitude longitude from the window that appears 13 Printing If you need a high quality printed waterproof topographic map please consider ordering one from http www mytopo c
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