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

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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 = ...
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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 ...
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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
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3answers
4k 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
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1answer
179 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
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2answers
285 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
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2answers
4k 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
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3answers
1k 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(...); ...
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2answers
119 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
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1answer
1k 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
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1answer
385 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
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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
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2answers
1k views

Stylized map workflow: Illustrator to Google Maps / OpenLayers

The aim My current aim is to create a series of (heavily) stylized diagrams and maps. I'm not very familiar with any GIS software, so my weapon of choice would be to use illustrator for creating the ...
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 ...
3
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2answers
88 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
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2answers
1k 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
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1answer
485 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
100 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
386 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
512 views

Google Maps: obtaining the border of an area

When using the geocode API it is easy to obtain the (centre of the) coordinates of the address. For example: Rotterdam. If you look up the same location in Google Maps you also get the surface area of ...
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
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2answers
993 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
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4answers
8k views

How to use Google Maps V3 Geocode with Openlayers

How to use Google Maps V3 Geocode with Openlayers. Below is my code but the function does not execute when I try to integrate it with Openlayers. This works with my original google v3 file. Below is 2 ...
3
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1answer
457 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
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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
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2answers
416 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
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1answer
204 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
139 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
390 views

google map api v3 large/complex polygons

I have quite some large/complex polygons I'd like to overlay on a Google map. I can do this but wondered what the best/fastest way is to load them? I have tried using a KML but understand there are ...
3
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1answer
872 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
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1answer
385 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
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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
879 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
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1answer
464 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
536 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
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1answer
286 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
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 ...
3
votes
2answers
104 views

Import Google Maps locations to ArcMap

I have a problem with importing a list of coordinates to ArcMap. I have a shape file of regions of Chile and I would like to add a list of locations with coordinates I got from Google Maps. The shape ...
3
votes
2answers
286 views

How to add link in ArcGIS Online web map popup to google or bing driving directions?

I have an ArcGIS webmap with school boundaries. I would like to provide a link in the pop up that takes a public user to a free routing website like Bing or Google with the directions to their ...
3
votes
1answer
54 views

Exporting massive gps tracks to a map

I have about 1000 vehicle equiped by a GPS sensor and 3G connection. Each vehicle feeds a csv file -using 3G connection- with its current location every 5 sec. Each vehicle have its own CSV file. ...
3
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1answer
93 views

Conversion from Namibian Coordinates to Google Maps (WGS84)

I have coordinates in Namibia, but don't know how to convert them to use them in Google Maps. The system is Lo22/19°. Then Y: +55 435,89 X: -498 157,28 Can anyone help with a conversion?
3
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2answers
1k views

GoogleMaps URL string to display unique marker

This is a topic I thought as easy as pie to solve with just a Google search and which is in fact quite complicated. When I use the following URL string to open a GoogleMaps window on a specific ...
3
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2answers
348 views

Render data on top of Google Maps

I have an interpolated temperature data samples that covers a map evenly. The data is in the form of (lat,lon,temp). I want to render that data on top of google maps. I tried google heat maps and the ...
3
votes
1answer
566 views

Plotting multiple addresses with distance to specific POI

I'm not sure if this is the correct place for this question but here goes. I am getting ready to move to a different city. Right now I have about 80 houses to choose from. One of my parameters for ...
3
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2answers
1k views

Rendering geoJson polygons in google maps android apiv2

I'm in the process of publishing spatial data stored in a postgis database to a google maps based android app and am trying to put together a plan for rendering my data in the most efficient manner ...