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

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133 views

Looking for open-source solution to show map with massive objects(3x3 polygon) on a web site

I don't have much experiance in GIS systems. I am developing a web site which need to show a map with 3m x 3m rectangles for a radius of about 400 meters.(about 58,000 polygons for one location) I ...
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1answer
2k views

How to calculate polygon area considering slopes?

I am looking for an accurate algorithm or a service to calculate surface area on earth where points are calculated on the basis of GPS Coordinates. I am using Google Map Api version 3 and are drawing ...
5
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1answer
818 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 ...
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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 ...
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2answers
572 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 ...
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1answer
390 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 ...
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3answers
2k views

What restrictions on KML/KMZ upload exist in Google Maps API v3?

I am currently using the google maps api v3 to load kml files into my web application. The file I am having trouble with is a KML which is 274 KB big. It will not load (uncompressed the file is ...
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1answer
2k views

Is there an event fired when a kml layer has finished loading in google maps?

Is there an event fired when a kml layer has finished loading in google maps? Google maps api version 3 To add a layer I have code like: var layer = new google.maps.KmlLayer(layerUrl, { map: map, ...
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382 views

Simplest Way to Create a Custom Choropleth Map for a Website?

I am working on a choropleth map for a real estate site. My current workflow is: Edit and save SHP file's DBF in Libre Office Calc. Load SHP file into Quantum GIS. Set colored breakpoints based on ...
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1answer
8k 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 ...
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1answer
439 views

Generate tiles for google maps overlays

I am trying to show some information on Google Maps which would be in the form of translucent circle overlays. The problem is that some circles overlap, which results in increased opacity and blending ...
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41 views

how do you sort points so that they are geographically near each other [duplicate]

Possible Duplicate: One dimensional map of the world? I am trying to create a google map. I am creating placemarkers using an external script in a kml file. I'd like to sort the markers ...
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854 views

Calculating compass bearing between two GPS coordinates… with a twist

I'm building a virtual tour application that uses Google's streetview code to render the panoramas into a non-distorted view. Each panorama has 1 to n links where the user can select to move on. I ...
4
votes
2answers
6k views

Calculate bearing between two decimal GPS coordinates

I'm building a virtual tour application that uses custom panoramas in conjunction with Google's StreetView service. With StreetView, you can have 1 to n links at each particular location to move to, ...
4
votes
3answers
283 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
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2answers
17k 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?
4
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1answer
2k views

Google maps android vector rendering : how do they make it that fast?

Most of the question is in the title. If you are on android (I believe its the same on IOS) and use maps you will notice the quality of the maps app and how the vector maps are drawn in a very fluid ...
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4answers
10k views

Examples of Google styled Maps? (including JSON)

After watching a great video on creating different map styles with Google Maps, I have been having some fun playing around with the Google Maps Style Wizard. I was hoping to find a gallery of user ...
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4answers
2k 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 ...
4
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2answers
747 views

Looking for a Provider of UK boundary data

I'm working on a web project centered around the input and mapping of GIS data. We have a need to display polygons of town boundaries. The RightMove.co.uk website has and uses this data: ...
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3answers
6k views

How to get an address or location from Google Maps?

How can one get the street address and/or coordinates of any location on Google Maps with a minimum of fuss? Google Calendar will spawn a window with a map to the location one specifies in the ...
4
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3answers
3k views

Check if lat/long point is within a set of polygons using google maps

I know how to do the above using Esri (Query task on shapefile), but can this also be done using Google Maps? Do I have to query each polygon or is there one method to query a set of polygons?
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2answers
358 views

Maps API that look “fancy”

We have been using Google Maps V3 during the development of a web service. We've been struggling with getting the maps integrate good with the design, since the maps look kind of grey. Now when i look ...
4
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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 ...
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1answer
277 views

Can someone explain in simple terms the licence on Google “satellite” images?

What can I and can I not do with the Google satellite images?
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15k views

How do you get the coordinates from a click or drag event in the Google Maps API V3?

I have made a Google Version 3 Geocoder , I want to be able to pick up the coordinates of the marker when it is dragged or clicked. Below is my code: <!DOCTYPE html> <html> <head> ...
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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 ...
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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 ...
4
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3answers
223 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 ...
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3answers
574 views

Search by street name/postcode in OpenLayers

Can anyone help me search by street name in OpenLayers? I essentially want to be able to search fir streets/postcodes in openlayers in the same way I can search on google maps. Is this possible. ...
4
votes
3answers
6k views

Solving the Point in Polygon Problem Using Google Maps and Fusion Tables

The Point-In-Polygon problem is fairly well documented on this forum. My question is if there is a way to use Google's free tools, i.e. Google Maps, Fusion Tables, and possibly Google Refine, to solve ...
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1answer
557 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 ...
4
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1answer
3k 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 ...
4
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1answer
7k 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 ...
4
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3answers
681 views

Google earth Borders on Google maps

Google earth comes with a variety of borders, for example: International Borders 1st Level Admin Borders 2nd Level Admin Regions I was wondering if it is possible to render these borders on Google ...
4
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1answer
5k 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 ...
4
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1answer
486 views

How to find the nearest polygon from a given point?

Basically I have set of points [lat-long pairs] which defines different polygons on map. Now I have a coordinate [lat-long] from which I want to find the nearest polygon from that point. Any help ...
4
votes
1answer
375 views

Shapefile vs Arrays of coordinates to build Google Maps overlay?

I am very new to GIS, and my task is to overlay about 100 polygons on a map. I'm using Google Maps Javascript API v3. I think I can define all my polygons as sets of lat/long coordinates in my ...
4
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3answers
1k views

Is there any way to add a google maps layer in a qgis web client project?

Is there any way to add a google maps layer in a qgis web client project? I made a qgis project using a google maps layer from OpenLayers Plugin. In my desktop project, this layer works fine. But ...
4
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3answers
5k 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 ...
4
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2answers
143 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
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2answers
5k views

Removing polylines from google maps

I have a point where a Gpolyline line is drawn from a marker to another point. After I click on it a second time, I want to remove the polyline. How do I remove the line after clicking on the marker a ...
4
votes
1answer
533 views

Google maps wms layer with 3857

I am adding wms layers to my google maps application. As Google Maps projection is a web mercator, I thought it would be better to request wms layers with srs=3857 (or equivalent) instead of the 4326. ...
4
votes
2answers
1k views

Can you use Google Maps offline, with OpenLayers?

I use OpenLayers, GeoServer and PostGIS in my application. Is it possible to have Google maps offline? No need to connect to internet to get it. I'm working to make my app working offline only for ...
4
votes
3answers
266 views

Time-aware layers WCS Service

I am currently developing an application that requires to display raster images over a period of time (I'm looking how Hurrican Sandy progressed). While investigating, people have suggested that I ...
4
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2answers
875 views

Openlayers - Vector layer polygon doesn't move in-synch with Google V3 baselayers

When a polygon is drawn on the map and the map is dragged, the position of the polygon relative to the GM V3 base changes. function init() { var map = new OpenLayers.Map('map'); var gsat = ...
4
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1answer
242 views

geodjango slowness and debugging

I'm using geodjango + postgres to display polygons from tigerline on a map. Pretty simple stuff so far. My issue is that when I use the GPolygon object: django.contrib.gis.maps.google.GPolygon there ...
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2answers
794 views

From pdf to google maps overlay

First post, so be gentle. Context - I'm doing some research into healthcare provision and I'd like to visualise the data. I'd like to be able to put these PCT boundaries as an overlay to google ...
4
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3answers
4k views

OpenLayers: Showing a WFS overlay on top of Google Maps

I have found similar questions asked previously, but I still fail to get a simple WFS point layer to work using OpenLayers and Google Maps. The original code I used was based on WFS polygon layers I ...
4
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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 ...