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

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2answers
1k views

How to convert ESRI SHP to KML with correct coordinate system?

I am working on this SHP file, containing geographical district of Hong Kong. I would like to export this to KML and export it to Google Map for overlay. After I converted it to KML in QGIS (just ...
3
votes
2answers
1k views

OpenLayers with Google, Bing & MapQuest - Does it violate the terms of service?

to my understanding, you are not allowed to use the Google Maps API to display Google and Bing maps (Layer Toggle) (From the terms of service). However, I'm unclear if I can have an OpenLayers map ...
3
votes
2answers
403 views

Third party base layer other than Google map

Can we use third party base map (images tiles) for displaying vector data?, like we use google map as base layer for displaying vector data in OpenLayers application.
3
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3answers
900 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 ...
3
votes
2answers
240 views

UK area boundaries

I'm working on a web project that requires polygons and lat long coordinates for the boundares of towns, citys, countys and postcodes. Does anyone know where i can obtain this data? i know rightmove ...
3
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3answers
4k views

How to use WKT in Google Map V3?

We have a shape with the following WKT. The problem with google map we normally extract out each of the lat and long value and put into an array and finally will do something like this. It works fine ...
3
votes
1answer
2k views

What projection to use for Google Maps?

I'm loading a WMS layer which comes in WGS84 into Google Maps. From what I've read so far, I should reproject this layer to Google Pseudo Mercator (either 3857/900913). However, when I save the layer ...
3
votes
2answers
2k views

Google Maps/ OpenLayers only rendering top left tiles

I'm seeing a weird issue with Google Maps and OpenLayers. When loading a page as shown below, only the two top-left tiles render, leaving the rest of the map blank. I looked in the Network tab in ...
3
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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 = ...
3
votes
2answers
2k views

Printing maps from OpenLayers with a Google Maps base layer

I need to implement an automatic pdf report generator on a web site. In the generated pdf file I need to insert images from maps extracted from OpenLayers with a Google Map base layer. On top of ...
3
votes
2answers
167 views

Using ArcPy to zoom to Y,X (string) coordinate pair copy/pasted from Google Maps?

I frequently use google maps to find locations, and paste the coordinates into the "go to XY" toolbar in decimal degrees. It's a bit repetitive to paste the latitude into one box, and the longitude ...
3
votes
4answers
2k views

QGIS OpenLayers 3 Google Maps not zooming

Google Satellite will not zoom. Although the scale changes as I zoom, as the map is re-rendered, it zooms out to its maximum extent every time. This first happened in the latter part of November ...
3
votes
3answers
5k views

Converting from an x-y coordinate system to latitude/longitude

I'm building an indoor wifi-based tracking system that can calculate the position of a device in meters relative to the sensors distributed throughout the building. So far I've gotten to the point ...
3
votes
1answer
202 views

Interactive Web Maps That Update as Users Change Attributes

I want to create an interactive map where users can go to the website, click on a polygon in the map, and have a chioce of three options. When they click one, it will change the color and update the ...
3
votes
2answers
326 views

Are there any good libraries for visually creating simple Google Maps?

I'm working on a simple webapp that lets the journalists I work with easily construct styled Google maps. In short, I need an interface that lets users place markers, set zoomlevel and choose a ...
3
votes
2answers
5k views

Google Infowindow Position

I am using google maps and using markers on the map. When user clicks on any marker showing related information in the Infowindow and every thing is working fine. But every time the infowindow opens ...
3
votes
3answers
2k views

What is the formula for calculating world coordinates for a given LatLng in Google maps?

I want to calculate a given LatLng to the world coordinate . I know I can use the internal projection of Google maps like this: var map=new google.maps.Map(...); ...
3
votes
2answers
135 views

Google maps white striations / false artifacts

What are the common white striations running from NW to SE visible when you zoom in around 5mi scale? For example at (+81, -80)? But they appear 'all over'. Are they snow drifts? or satellite sweeps? ...
3
votes
1answer
2k views

Understanding the difference between coordinates projection in OSM and Google Maps

I'm looking at the coordinate differences between Google Maps and OSM. I'm a noob in the technicality behind GIS. Having read: EPSG 3857 or 4326 for GoogleMaps, OpenStreetMap and Leaflet How to ...
3
votes
1answer
467 views

How does Google Map API authenticate users?

They put a limit on the amount of map views, geocodes etc that can be done each day but in the documentation I can't find anywhere where they actually list how it is authenticated. My guess is it has ...
3
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1answer
1k views

Google Maps Decodepath change variable name

I have this code: var directionsService = new google.maps.DirectionsService(); var request = { origin : start, destination : end, travelMode : ...
3
votes
3answers
4k views

How to display 33k placemarks with custom symbols/labels?

I want to overlay address numbers on our embedded Google Map (V3 api). Even though the KML is under 2 MB, it exceeds the 1,000 feature limit; there are over 33,000 placemarks. Fusion tables solve ...
3
votes
1answer
231 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 ...
3
votes
3answers
2k views

Export Google Maps Route to KML/GPX

Since Google pulled the plug on Google Maps Classic, I'm reluctantly moving to its Google Maps New application. However, I didn't find how to export a route to a GPX or KML file so it can be copied ...
3
votes
1answer
1k views

Is it possible to query via bounding box in the Google Maps Static API?

We have a Qt program written in C++ to request wms tiles and display them. This works fine. Now we want to display imaginery from Google Maps and due to some restrictions in our program, we can't use ...
3
votes
2answers
2k views

Openlayers using Google Maps as base layer: possible to zoom out farther than max extent?

See attached picture. This is how it is when the page loads. I'm currently using map.zoomToMaxExtent(); Everything is working pretty well but I'd like to zoom out more/see the whole world using ...
3
votes
1answer
670 views

How do I find the intersection of two polylines in PostGIS?

I have a set of road conditions reported for small segments of road, and I am hoping to determine the specific subset of each segment which intersect with a route along the road so that I can draw the ...
3
votes
2answers
103 views

Where can I find a map with the location of towns and cities in Southern Sudan?

For a project I have some name of towns and cities in the Southern part of Sudan, the region South Kordofan. Many of these towns I can't find on Google Maps, but I need to know their location. ...
3
votes
1answer
471 views

How to place markers on the outline of a circle in google maps?

I have the center of a circle and it's radius and I need to place variable amount of markers on the outline/stroke of the circle. The distance between this markers should kept same, so if I have 8 ...
3
votes
1answer
156 views

Can I customize a Google Maps layer in terms of content?

I don't want all features that come with the Google street layer. I just want basic infrastructure like roads, national parks, cities, streets with their names, etc. Everything that is public is OK. I ...
3
votes
2answers
1k views

Image tiling math

I've been looking at MapTiler for the logic on how to render an image as tiles on a (google) map. Instead of storing the single tiles locally in a folder structure I want to use Djatoka. I'm able to ...
3
votes
4answers
1k views

Separation of Land - Body waters

Let me start by saying that I am not a GIS expert nor a cartographer , and my knowledge of GIS is limited to the quasi-null professional training I had as an architect. My question here was ...
3
votes
1answer
510 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 ...
3
votes
4answers
6k views

Calculate length and area with Google Maps API v3

Google Maps API v2 had great methods for lines and polygons to calculate length and area. v3 is lacking these methods (maybe just for now?). What other options do I have for calculating line length ...
3
votes
1answer
88 views

Put png map image as a background to draw upon

I have an image of a fiber optics network map: I want to turn this map image (without any actual GIS data) into a vector map where each point is defined by lat, long. To do this, I'm trying to ...
3
votes
2answers
617 views

cartodb.js highlight the polygons on mouse hover for Google map v3

We are using cartodb.js with Google map v3. We are trying to highlight the polygons on mouse-hover. Is there a way to highlight the polygon on Google map using cartodb layer?
3
votes
1answer
344 views

Styled markers : how to get bouncing markers with location dots?

I want to mark important location with bigger markers (pointer with forks) and smaller location with normal markers (colored dots). I want big markers to bounce on hover. How to acheive this effect in ...
3
votes
1answer
230 views

Is google maps static api free?

I'd like to write an app which uses google maps (via javascript library like gmaps.js). I'll GET the GPS positions from my server and I'll use google maps+js library to draw them on map. I don't ...
3
votes
2answers
1k views

QGIS 2.0.1. missing Google Mercator CRS

I've downloaded the latest QGIS version and I cannot add basemap. I installed OpenLayers plugin and while adding any map from list QGIS crashes. I tried to enable Google Mercator CRS first, yet it's ...
3
votes
1answer
1k views

How to merge several google map images into one?

I want to have a high resolution aerial photo of a catchment area. I took some images from google maps and georeferenzed these and saved them as a layer file. but how can I merge them now that I have ...
3
votes
1answer
441 views

What is the best API to use GeoTools or uDig (for the context of my application)?

I am trying to develop a java application that displays : Google maps, Openstreetmap and Bing Map Data. So which is the best SDK to use in this contet Geotools or uDig ?
3
votes
1answer
1k views

OpenLayers - Vector Layer and Google Maps - vector layer and google layers don't seem to be in sync when zooming on Chrome

I am working with a Google Layer and a vector layer in OpenLayers. I was wondering if anyone else noticed any problems with Chrome displaying Google Maps layers on OpenLayers? It seems that when I ...
3
votes
1answer
908 views

Why does my WMS layer overlap the Google Maps v3 logo?

I'm using Google Maps v3 as a base layer and on top of that I create an overlay pointing to my WMS (streets and avenues). A few months ago all works fine, my WMS layer was not overlapping the Google ...
3
votes
1answer
3k views

Zooming Google Maps to fit the extents of a Fusion Table layer

How can I zoom a Google Maps control to fit the contents of a Fusion Table layer? The layer only contains pushpin / marker point data. One method is to perform a REST query on the Fusion Table and to ...
3
votes
1answer
498 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 ...
3
votes
1answer
617 views

How to generate a grid of horizontal equal-area rectangles in a Mercator projection?

I'm new to GIS so pardon my ignorance and bear with me. I'm generating a grid relative to a LonLat point. To make the cells all equal area, I'm creating it in 2163 projection. The problem is that when ...
3
votes
1answer
295 views

How to map our data with Google Map data

I want to add all the bus route data and create a route finding app for my country since Google map has no data about bus routes in my country but with JavaScript API i could get the shortest path ...
3
votes
1answer
2k views

Georeferencing with Quantum GIS and reprojecting to EPSG:900913

I'm trying to reproject a map to EPSG:900913 The image I'm reprojecting is the following http://i.imgur.com/HmfLW.png I'm using the cities as reference points obtaining the coordinates from Google ...
3
votes
1answer
1k views

Retrieve road segment from Google or Bing Maps

Let me see if I would be able to explain this correctly... Both Bing and Google Map geocoders can return you and a point given an address. Is there any way to retrieve an 'address range' instead i.e. ...
3
votes
1answer
2k 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 ...