Google Maps is a web mapping service application and technology provided by Google free (for non-commercial use),

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2
votes
3answers
4k views

OpenLayers weird problem with GoogleMaps base layer and WMS overlay

I'm trying to overlay a WMS layer over GoogleMaps base one. The WMS layer is defined like this: var catastro_layer = new OpenLayers.Layer.WMS( "WMS Catastro", ...
4
votes
2answers
6k views

register event “loadend” on layer

I'm trying to register a listener event on "loadend" for my google maps layer on OpenLayers. But for some reason it's not firing. There must be something small i'm overlooking. What is wrong with my ...
8
votes
2answers
4k views

How to cluster Google Maps kml overlay

I have several thousand markers stored in a kmz file that I load into a Google Maps (v3 API). I've looked around to find a way to cluster the overlay data, but to no avail. MarkerClusterer looks ...
3
votes
1answer
1k views

sharpmap overlay mapinfo on bing/google

I want to use sharpmap to overlay a mapinfo tab file onto google or bing. I have it working pretty much at the moment however the co-ordinates that bing/google show are in correct so my mapinfo file ...
5
votes
2answers
650 views

BBOX and Projections of WMS services in Geoserver

we have tried to overlay a raster layer on Google map and have some difficulties to align the raster images onto the base map. When it is on the overview (Zoom level 1), it looks like this: On a ...
4
votes
2answers
994 views

Determine tile identity of tile set displayed on Google Maps/OpenStreetMap

I'm not sure if this is best way of approaching this, so I will explain where I'm coming from first. I want to load data onto my webpage containing a map based off a lat/long point. The only way I ...
20
votes
6answers
14k views

What's next if our KML is too big/complex for the Google Maps API?

Our web app includes simple mapping capabilities (currently just markers and KML overlays on an embedded Google Map). This works pretty well; the only real limitation we face is KML overlays that go ...
2
votes
3answers
302 views

Does Google Maps follow W3C guidelines for accessibility

Hello Does google maps conforms with the w3c accessibility recommendations(A,AA,AAA)? Cheers
11
votes
5answers
1k views

Satellite Imagery Providers

I'm building a web application - my requirements are: Must have global satellite imagery. Must have easy to use API's that are capable of geoJSON data imports, mouse and keyboard gestures, etc. To ...
2
votes
1answer
3k views

How to change the zoom on an embedded google mymap?

I embedded a google mymap in my website using the embed code they provide. However it is zoomed much too far out. How can I zoom it in? I added the second character (undrscore) so it would display. ...
3
votes
1answer
7k views

Select more than one place at a time in Google Earth?

I've got a Google Earth .kmz file opened in my copy of Google Earth 6.0.1.2032 running on Mac OS X 10.6.7. There are about 5000 points/"places" in the file and they show up fine. What I would like to ...
2
votes
1answer
927 views

Geowebcache does not displaying map tiles in EPSG:900913 from a remote WMS server

I connect Geowebcache to a remote WMS service through their Getcapability request by adding the url in geowebcache-servlet.xml document. Geowebcache demo page displays the list of wms layers from ...
2
votes
1answer
4k views

Highway Mile Markers to Lat and Lon?

Is there a way to search for highway mile markers on an existing mapping system and find the lat and lon?
5
votes
1answer
9k views

How can I get a KMZ file with image to show in Google My Maps?

Maybe this isn't possible but does anyone know a way I could get a KMZ file that includes a raster image to save into Google My Maps. I can get the KMZ to display fine with image by uploading it to ...
7
votes
1answer
1k views

How to create a 4096x4096 png from a 1440x720 data set using GDAL?

I'm having a bear of a time trying to do something that seems fairly straightforward. I'm trying to take a netcdf file from ftp://eclipse.ncdc.noaa.gov/pub/OI-daily-v2/NetCDF/2011/AVHRR-AMSR/ and turn ...
2
votes
3answers
4k views

Interpolate points between coordinates for smooth animation in google maps or openmap

I have an application where we want to create an animated route based on recorded points. I have an example that use the google maps driving directions, however, we already have points and they are ...
2
votes
4answers
2k views

GIS newbie, How to georeference a jpeg metro map using OSS?

I have a metro map in jpeg format and I want to georeference it. My goal is to find GPS location of the metro stops and visualize them on google maps. Probably, the first step is to overlay the map ...
3
votes
1answer
226 views

Unexpected Result After Reprojection Attempt

I'm a member of a student team that is currently researching how to query raster information using PostGIS v2.0. Our raster's coordinate system is EPSG 2236 (NAD 83 / Florida East) and as we will be ...
8
votes
4answers
1k views

Performance of google map tile creation processes

I know that question is rather vague but please bear w/me. I'm trying to get an idea of what sort of product performance - specifically timing - people have seen for various methodologies they have ...
7
votes
1answer
1k views

How to setup GeoWebCache to produce same grid as GoogleMaps?

Is it possible to create gridSet in GeoWebCache which has same number of zoomlevels with scaleDenominators compatible with google maps? There is EPSG:4326 default, but no mention of number of ...
11
votes
2answers
1k views

Drawing Day and Night on a Google Map

I'm looking to plot day/night on a Google map, for an arbitrary point in time. I'm familiar with generating map tiles; I'm just looking for an algorithm to tell me whether a particular point on the ...
34
votes
10answers
59k views

What ratio scales do Google Maps zoom levels correspond to?

Can anyone provide me with a link (or some details) on the actual ratio to "zoom level" figures for Google Maps? e.g. Google Maps Level 13 = 1:20000
3
votes
2answers
364 views

Can one hide the Lat/Lng information sent to Google maps?

most services that use google maps have the Longitude / Latitude stored in the source to be sent to google maps to render their markers. However on this site (sorry Chinese) ...
2
votes
2answers
2k views

ARC GIS 10 + Google Maps API

Assalam o Alaikum I am new ARC GIS, is it possible to create a website that uses Google Map API but imagery from the ARC GIS 10 REST service? Actually, I like the functionalities provided by the ...
5
votes
3answers
1k views

GPS coordinates to neighboorhood?

I have tried both Google and Yahoo's Geocoding services to get the Montreal neighborhood/district from GPS coordinates but while they are both able retrieve the correct (address, city, state, country) ...
2
votes
1answer
2k views

Google Maps API v3 vs v2 (JavaScript): overlay problems

I have been using the Gmap API (v2) for dynamically displaying some data: oMap.map = new GMap2(document.getElementById("map")); oMap.geoXml = new ...
0
votes
6answers
2k views

Is it possible to query a MySQL database using the results from map.getBounds() with Google Maps API v3?

I have a MySQL database that contains a large number of polygons, one for each district on a map. They are all quite complicated and it's unrealistic to simply load them all at once. I've looked into ...
6
votes
1answer
2k views

Draw route direction overlay on Google Maps or OpenLayers

I'd like to display the route direction generated from GraphServer on either Google Map or OpenLayers. The result I want is basically identical to how Google Map shows route directions, by ...
5
votes
3answers
1k views

Server side clusterer for Google Maps

After doing a lot of research on different types of clustering coordinates (server side) I am still having problems with choosing the best approach for my project. My requirements: Ability to work ...
39
votes
5answers
10k views

Why is the 'straight line' path across continent so curved?

This is the result of mapping the straight line path from a point in US to Poland using Distance Measurement Tool. Also, planes from Asia to US would travel almost over North Pole. Why is the path ...
2
votes
3answers
483 views

protecting kml access to google only

I have a large amount of data (thousands of polygons) that I want to share with people through my site. I want them to be able to view the polygons, and due to the large amount of data, I am not ...
5
votes
4answers
1k views

What is a best practice way to display/feed US census/tiger data into Google Maps API?

Let's say I want to display age, income, etc based on census block groups on Google maps. What is the best practice or recommended way to do so and also to allow to do simple queries?
6
votes
1answer
1k views

What causes these shiny artifacts in Google Maps imagery?

Do you know what causes artifacts like this one: Source: ...
4
votes
1answer
2k views

Google Maps API: Is there a way to do proximity analysis to POI

Using Google Maps API can I do proximity analysis, for example: In a state, let's say Virginia, display all the points that are 500 ft/m from a POI such as McDonalds or Bob's Diner, 1,000 ft/m from ...
12
votes
5answers
1k views

Quality of free geodata compared to commercial sources

What are the sources of excellent geo-location data as possessed by Google Maps ? I am wondering that, even with large amount of volunteer work involved, why is OSM data not comparable to theirs in ...
9
votes
1answer
9k views

How to apply custom Google map style in OpenLayers?

Recently I stumbled upon interesting article showing potential of adding custom styles to Google Maps. Some examples of styled maps can be seen here and you can design your own from scratch here. ...
8
votes
4answers
1k views

How to Geocode a City

First, a little disclaimer. I know that I can just call one of any number of geocoding APIs to perform this for me. This is more of a curiosity than anything else. With that aside, how does someone ...
12
votes
8answers
5k views

What methods are there to produce map tiles for google maps?

newbie to stack exchange here. I'm currently using the automatic tile cutter found here to make the standard 256x256 tiles required to make a custom map type for my map. The map tile cutter script ...
4
votes
1answer
1k views

Best way to visualize Google Maps and Mapinfo (or SHP or SQLite) at the same time?

I am having a bunch of Mapinfo data of a large area. This data has multiple layers and is also available as SHP, and of course it could be easily converted to SQLite ("SpatiaLite"). Although probably ...
5
votes
2answers
1k views

How to Georeference 3D model or 3D buildings?

I am working on 3D project so i have to do georeference to 3D buildings which are created by 3D designer.Anyone Knows the solution.Please send me.
1
vote
1answer
1k views

How to overlay country map on google world map in openlayers?

Hi I am creating one map.So i want to overlay country map on google world map.I am trying with OpenLayers.Layer.wfs() function.but i am not getting perfect solution.If anybody knows the solution ...
3
votes
3answers
827 views

Google Earth alternate tile set

I have a Google Maps compatible tileset running on a local server and I can browse this in a browser with the Google Maps API and OpenLayers. Can I force Google Earth to use this tileset so I can ...
4
votes
3answers
6k views

Using the Proj4js library to convert from Google Maps to projected values

I'm using the proj4s javascript library (based on advice from this question I asked previously) to convert lat/long values on my webpage. This page receives the lat/long values from google maps and ...
2
votes
2answers
1k views

Converting google map api coordinates into meters

How would I go about converting the results of my map bounding box into meters within javascript? For example, if I have the coordinates 51.52366625446907, -0.07467269897460938 decimal degrees, can I ...
2
votes
1answer
357 views

GGeoXml error with Arcgis extension for google maps api

I'm using the ArcGis google maps extension. I've created a simple page based on the esri example here... I have successfully buffered a polyline, however, when I create a query and execute the ...
5
votes
2answers
410 views

Google Street View with Image Only

Is it possible to open a location in Google Street View and have it show ONLY the Street View image? For example, if I open the following link: ...
2
votes
3answers
5k views

Opacity control for KmlLayer in Google Maps V3 API?

Using a KmlLayer object within the Google Maps API, is it possible to control the opacity of a KML's image overlay features ?
4
votes
2answers
4k views

Is there a library to make custom markers for Google Maps API V3 by setting the marker's icon, labels and opacity?

Is there a library to make custom markers for Google Maps V3 by controling the icon, labels and opacity? This library for Google Maps API V2, Labeled Markers, seems OK, but I was hoping for a V3 ...
4
votes
3answers
982 views

Google Maps with Tiled Image

I'm trying to get a weather image to display on Google Maps, however in my comparisons to others it seems as if my image is slightly to small (Vertically).. I'm wondering what I might have done wrong ...
12
votes
2answers
1k views

Technical and usability differences between OpenLayers and Google Maps API V3

I know this is supposed to be a wiki question, but the feature has been taken of the site What are the main differences between OpenLayers and Google Maps api? What are the strengths and weaknesses ...