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

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2
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3answers
5k 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
3k 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
229 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
2k 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 ...
36
votes
10answers
66k 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
379 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
3k 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
3k 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
3k 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
2k 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 ...
41
votes
6answers
11k 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
503 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
2k 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
3k 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
10k 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
2k 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
6k 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
2k 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
881 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
7k 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
359 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
421 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
6k 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
998 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
2k 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 ...
15
votes
3answers
1k views

What is the wire format for Google's new vector map tiles?

Google recently released new vector cartography for their mobile maps. I'm curious if anyone here has any insight into the wire format they use for transmission? I've experimented with a few formats ...
4
votes
3answers
291 views

Differentiating a building from a road on a map?

This question was originally asked here by Steven and I felt the question was better asked here. Steven would also like to know the sources Google buys it maps from. I remember seeing a post about it ...
4
votes
2answers
144 views

Detecting trends in local business web services

Do you know any research paper about spatial data mining algorithms to retrieve trends about local business services (such as google places.. etc) let's say most rated restaurants this week.. etc ? ...
4
votes
3answers
230 views

Using a web map to identify and access data

I am trying to making a webpage where the user pans and zooms on a map, and based on the location and zoom level, some data is displayed on the webpage (drawn from another source). The data that will ...
5
votes
1answer
4k views

Find bounding box of a Google map

Is it possible to get the bounding coordinates of a google map that a user has zoomed to using Javascript? I see that it can be done using the Google App Engine but I don't know if is possible using ...
5
votes
3answers
879 views

Plot a EPSG:4326 KML File using Google Maps V3

I have a KML file that uses EPSG:4326. Is there any way to plot this onto a Google Map (v3) which uses Mercator? Here is the page I am working on The district data comes from one source and is ...
4
votes
1answer
429 views

How to decode Google's proprietary latLon format for China?

This Google Maps link returns train stations in Shanghai, China. By appending '&output=js' it returns it in JSON format. I'm trying to decode the format Google uses for lat/lon: latlng:{ ...
7
votes
4answers
6k views

Plotting KML files onto a Google Map

I would like to show a map on my website. I have 2 different kinds of KML files that need to be plotted. One defines region boundaries. The other points within those boundaries. The region boundaries ...
7
votes
2answers
7k views

Using Google Maps as layer in ArcMap?

Can I use Google Maps as a layer in ArcMap? Is it possible?
10
votes
6answers
1k views

What is this “brown spot” in Google maps?

I was in Google maps today and noticed near Baltimore, US where the river is, there's a huge brown spot. Is this due to all of the waste? If so, will this keep going all the way into the ocean?
6
votes
2answers
3k views

Generate a kml file from Google results

Is it possible to generate a kml file of searched items in Google Maps. For example: Search for highschools in Virginia Return the results as a kml file with the schoolname address and location
6
votes
2answers
367 views

Randomly Generate Streeview Point without GIS in country

I'm interested in pulling street view data at random within a country. I can only figure out how to generate a point within a bounding box. Often it pulls data from nearby nations. I'm using a GIS ...
10
votes
4answers
805 views

Suggestions for simple mapping platform for alumni web site

I'm working on a proof of concept alumni site with a WordPress backend. I want to have a very simple map that shows where alumni are living. I'm thinking something like the Bing API or a simple open ...
2
votes
1answer
2k views

Add a polygon to PostGis from Google Maps

i have some experience with Google maps api, I have an app and currently calculate nearest points to locations via distance functions (great circle) and having a lot of waypoints on MySQL. I want to ...
7
votes
4answers
21k views

Moving marker smoothly along two GPS coordinates

I am trying to animate a marker from one GPS coordinate to another. I am currently using Google Maps to achieve this and, although my algorithm seems right, Google Maps is doing a poor job at ...