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

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14
votes
2answers
4k views

Is it possible to gray out a Google Maps map except for some area?

What i am looking for is a way to emphasize a certain area on a Google Maps map by graying out the rest of the world. I heard about some solution of using 2 polygons of which 1 is visible and the ...
4
votes
4answers
1k views

Why does this Mapserver layer not overlay correctly onto Google Maps?

I'm using mapserver to serve an overlay of weather data onto a google map (V2) and the weather data is not displaying where it should. The image below shows the problem i am having. The black lines ...
1
vote
0answers
250 views

How to Modify Polygons in GeoDjango?

Just getting acquainted with GeoDjango. Have Basic Tutorial app created with sample world data. In trying out the admin, I appreciate seeing the polygon on the map and a couple basic tools for adding ...
4
votes
4answers
3k views

Using a list of geographic locations, and determining the X closest locations to a user-defined location

I've got a list of geographical locations in an Excel spreadsheet. I want users to be able to search for a user-defined location, and then have the X number of closest locations from the list pulled ...
5
votes
1answer
1k views

What is the best map provider solution for repetitive routing use?

[edit] What is the best solution in terms of cost effectiveness, stability & speed for running a lot of routing requests and comparing them. lots of times over and over? I understand now that it ...
3
votes
2answers
1k views

Simplifying Shapefile using ArcGIS Desktop or alternative?

I have a shapefile that contains neighborhood boundaries that I want to simplify. Right now I am thinking of converting the shapefile to Google maps KML so I can insert the boundaries into the map as ...
1
vote
2answers
914 views

How to create a custom Balloon for Google Earth?

I just came across one question related to google maps in stackoverflow. Google Maps: How to create a custom InfoWindow? I really like the popup that they mentioned in the question and the image is ...
3
votes
2answers
6k views

How can I display this polygon in Google Maps, properly

NOTE: this question is sorta like a follow-on question to this original GIS Question I asked. In that question, the main suggestion was that I was trying to show two polys. Now, I'm asking about a ...
6
votes
1answer
295 views

Plotting 1M+ intensity reading as custom shapes with Google Maps

I currently have a database (Mongo, atm) holding roughly 1M points of data corresponding lat/lon/intensity values that I'd like to plot over a region using the Google Maps API. Ideally, I'd like to ...
4
votes
1answer
669 views

Open street map accuracy problem

I want to locate shops with open street map. For that I send a query to nominatim, a webservice which geocodes coordinates from addresses. I draw a marker at the returned coordinates, and it´s ...
2
votes
3answers
193 views

Best program for crowd-sourced polygons on Gmaps

Looking for a way to crowd-source polygon creation on GMaps (in a wiki environment) that doesn't involved ESRI's expensive server software. Requirements: - a bunch of different wiki pages can be ...
3
votes
1answer
2k views

MS SQL Server's STDistance output differs from Google Earth/Maps straight line distance

I am testing SQL Server STDistance function in the following way: DECLARE @g geography; DECLARE @h geography; SET @g = geography::STGeomFromText('POINT(53.553813 9.99158)', 4326); SET @h = ...
5
votes
3answers
2k views

How to toggle Fusion Tables layer on/off based on map scale?

In the Google Maps API v3 I'm displaying points derived from a Fusion Table by specifying a FusionTablesLayer Is it possible to set a minimum/maximum scale on this layer, so it turns off when zooming ...
4
votes
1answer
5k views

Transforming EPSG:3857 to EPSG:4326

I am new to gdal and have a simple question. I want to transform an image from OpenStreetMap projection to Nasa Blue Marble projection. What I understand is that OpenStreetMap projection is EPSG:3857 ...
4
votes
1answer
5k views

Calculate lat lon bounds for individual tile generated from gdal2tiles

I have multiple tile sources generated using gdal2tiles I'd like to present on the same map. So when presenting a tile I need to determine which source to serve it up from, checking against the ...
3
votes
1answer
2k views

Pan & Change Zoom to show Fusion Tables Query Results in Google Maps JavaScript API V3

I've created this map -- https://s3.amazonaws.com/pdb.files/lookup_auto2.html -- using Google Fusion Tables and Google Maps API. I'm attempting to modify the code so that the map will pan and zoom ...
3
votes
1answer
484 views

What are the requirements for using Google's GEvent?

For a current project, we need to know when a Google map is done loading all of its tiles. I found the following question, which was for the same basic problem: register event "loadend" on ...
5
votes
1answer
967 views

Calculating radius / buffer on EPSG 3785 in meters vs buffer in WGS 84 in meters

The goal is working in EPSG 3785 and in particular Google Maps, one wishes to render (on a tile) a circle of a given radius in meters. The rendering is done in pixels. I would guess that one could ...
1
vote
4answers
2k views

Map in an iFrame - open hyperlink from infoWindow in the calling page

I've got a Google Map being served inside an iFrame on a page (eg xxx.com/PageWithMap.html) The code for the Google map sits on another domain (eg yyy.com/MapCode.html) So it looks like this on ...
5
votes
1answer
3k views

How to restrict zoom levels in the Google Maps API

Is it possible, in the Google Maps API v3, to restrict the zoom to specific levels (eg 16 and 7)? In my case I wish to show city points at a global scale, then show suburb polygons when zoomed in - ...
16
votes
5answers
11k views

Map projection in OpenLayers

I want to overlay some data whose projection is WGS-84 on Google map layer in OpenLayers. But I just can't make them in the right place. I did as follows: map = new OpenLayers.Map('map', { ...
13
votes
2answers
2k views

How can I fix my complex Polygons so they show correctly in Google Maps?

Problem: I'm trying to find a way to fix some broken polygon shapes and I'm not sure how I can do this. Details: I've got a number of polygons which I basically imported from TIGERLINES a while ...
4
votes
1answer
260 views

What are some options for embedding Google Maps into a WordPress site?

Background A non-technical user would like me to embed a Google Map into a WordPress-powered site. She needs the ability to add markers using a simple mechanism, and to link those markers to pages ...
3
votes
1answer
2k views

How to cluster 2 datasets in Google Maps API V3?

I'd like to produce a map that shows thousands of Markers. I'm using Markersclusterer to show all these markers. Yesterday, I received another huge data set (completely different) and I'd like to see ...
5
votes
1answer
2k views

Google fusion tables: Fill in lon/lat columns via geocoded address

I have a list of 100 companies that I want to geocode. I have all of their addresses but none of their lon/lat coordinates. I have three columns related to location: Address Longitude Latitude Is ...
6
votes
4answers
2k views

Point in polygon algorithm for multiple polygons

I've a Google map with bunch of polygons on it. Here is a problem I'm interested in: Given a lat,lng point, what's the best way to determine all the polygons that this point lies in? The obvious way ...
10
votes
1answer
1k views

Can you query overlapping user-defined polygons at a given point in Google Maps?

I need to find out the limitation of working with the Google Maps API, and the possible solutions for doing semi-complex spatial comparisons. What I'm looking to achieve is a system of comparison ...
5
votes
2answers
676 views

Using Google Fusion Tables to read Wordpress database… which in turn creates map. Can it be done?

Is it possible for Google Fusion Tables to read my Wordpress database? If so, how? I have custom wordpress fields which contain addresses for several hundred companies. Ideally I want Google Fusion ...
4
votes
2answers
34k views

Why can't I “turn on” a map view in Google Earth?

Why can't I toggle between map view and satellite imagery in Google Earth as I can in Google Maps? Is there an easy way to add Map View to Google Earth?
1
vote
0answers
217 views

Why do FusionTable layers sometimes not work / slow down?

Fusion tables layers are great. I have uploaded some data and polygons of areas in Europe and most of the time they respond very fast. First thing in the morning (after prolonged inactivity I ...
14
votes
2answers
16k views

Google markers at same address not showing all markers

I've been working on this map - http://www.mediwales.com/mapping/test/ It's plotting companies fine and clustering them ok but a problem has arisen with companies in the same building with the same ...
8
votes
2answers
1k views

How to obfuscate data when using Google Maps?

I've been working on a google map (v3 of the api) that is plotting 120 markers or so (or will do shortly) - see http://www.mediwales.com/mapping. If you view the source the map data is for all the ...
2
votes
0answers
189 views

How to add address block on Google Mapmaker?

Is it possible to mark a block of addresses for example B-block, xyz colony, which is a logical block of addresses on Google Mapmaker? If possible, how do I do it? I want to add a polygon feature ...
5
votes
1answer
490 views

Is there any way to match images against google maps satellite view?

I've got an image that was snapped from google maps satellite view. I know the general location (within a county), but need to find the specific location of the top-down photo. Are there any tools ...
1
vote
1answer
2k views

google maps V3 : in javascript api, render route obtained with web api

I have to obtain route directions with the Google maps v3 WEB (http request) api (computations are made server-side, based on this data, without client interaction, so no JS available). Then, the ...
8
votes
5answers
4k views

How to emulate this grayscale basemap look+feel in Google Maps

I love the design on the Development Seed homepage, where they've used a grayscale basemap with bold 3D-style graphic markers. It appears that they've used the ModestMaps API to create a tiled ...
2
votes
2answers
4k views

How to display a geotiff-image with OpenLayers at the “right place”?

I'm just starting with OpenLayers. I have a georeferenced geotiff and the associated world file. Now I want to display this image as an Overlay and google-maps as baselayer with OpenLayers. Would be ...
20
votes
9answers
77k views

How to avoid Google map geocode limit?

I'm creating a custom google map that has 125 markers plotted via a cms. When loading the map I get this message: Geocode was not successful for the following reason: OVER_QUERY_LIMIT I'm pretty ...
2
votes
2answers
8k views

Integrate MarkerClusterer with Google Map V3

I'm having trouble getting the MarkerClusterer into my current Google Map (which has taken a long time to get this far!!). How can I combine the two? I'm using V3 of the api. Here's the example I'm ...
8
votes
1answer
5k views

Using Drop Markers and MarkerClusterer together?

I want to create a rather visually appealing representation of time-series data (Costco Store Locations w/ opening dates). My idea was to plot them on a map, in time-series, but it seems that the ...
5
votes
1answer
4k views

Google Map API 3 with OSM overlay

I'm using GeoXml3 to parse XML files in Google Map and would like to add OSM as custom maptype. I fiddled with this example but it hides completely the original Google layers. I've found a couple of ...
1
vote
2answers
4k views

Given city and state, how to get the nearest zip code in US

We have a situation where user enters a city, state for which we need to find a corresponding zip code. In case there is no corresponding zip code, we are required to find a zip code that close to the ...
12
votes
3answers
4k views

Open source alternatives to Google's StreetView engine?

I am looking to create an open source javascript app using either Leaflet or OpenLayers. Is there any way to implement panoramic views (similar to Google's StreetView) into either of these, or any ...
2
votes
2answers
333 views

Choosing an aggregation strategy that will be spatially represented on a google map

I'm under an NDA so I cannot really get into specifics of what I am doing. But, suffice to say, I am taking a large amount of spatially-acquired data and drawing this data onto a Google Map surface ...
0
votes
2answers
2k views

Shapefiles for real world places [duplicate]

Possible Duplicate: Are there any free administrative boundaries available as shapefiles? This is a follow up to my previous question How to highlight the area in google map on mouse hover. ...
4
votes
1answer
10k views

How to highlight the area in google map on mouse hover

I want to implement a feature in my app (gmap powered) to highlight the area on mouse over. Much like the functionality in wikimapia. Check out the pic or url But i could't find any info on how ...
3
votes
1answer
480 views

Where can i find free mapnik map styles with focus on waterways?

I am using Google maps for my map tiles. These tiles are very road oriented. As i am making an application for waterways i would like to change my map so that its main focus is on waterways. I have a ...
6
votes
1answer
2k views

Add a OpenStreetMaps road data layer on Google Maps API v3

I've successfully embedded a Google Maps API v3 map on my site, and added OpenStreetMaps (OSM) as the base layer. Is it possible to use Google's tiles as the base layer, and then overlay street data ...
1
vote
1answer
2k views

How to overlay WFS output in GML format on a googlemap api v3 using GeoXML3

I would like to overlay a polygon layer on Google map API V3 from a WFS output file in GML2 format from a remote WFS server. No other output format is available in the WFS server. Is it possible to ...
9
votes
3answers
5k views

OpenLayers With StreetView Overlay

Im trying to add StreetView functionality to my OpenLayers web app, and would like to add the overlay showing StreetView availability to the map itself. I have seen an example of it being done ...