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

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3
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2answers
8k 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 ...
3
votes
2answers
2k 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 ...
3
votes
1answer
381 views

Can't get simple map to show up on my test site using CartoDB

So I'm trying to get a simple test-site setup but it's not working. Whenever I load the site I can very quickly see the controls flash on the screen then go away. The when not doing local testing, ...
3
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3answers
3k views

how to extract lat long from WKT data?

i want to extract lat long form WKT data and stores into arary list i have tried one solution which is proposed by a user but it has some problems String str = tv.getText().toString(); str = ...
3
votes
3answers
2k views

Why are the tile coordinates different in Google maps and Google earth?

I have a .NET application that typically uses the standard Google Maps JavaScript API V2. Within this application I am using a GTileLayerOverlay to add my own custom dynamic tile layer. function ...
3
votes
2answers
169 views

Google Maps not Showing in QGIS 2.12

The Google Maps in my OpenLayers plugin in QGIS 2.12 does not show anymore. The other maps do show, that is: OSM Bing MapQuest Stamen Apple Maps I tried in QGIS 2.8 and Google Maps does not show ...
3
votes
2answers
179 views

What software to use for political analysis?

Years ago, in the 1990s, I used MapInfo to do political analysis, voting histories and trends and the like. My knowledge is two decades old at this point, though. What are the tools I should be using ...
3
votes
3answers
728 views

How to pull lat/lng from a map canvas and update a database

So if i want to pull out lat/lngs after user clicks on a map canvas (lat/lngs are pulled using any javascript API (leaflet, wax etc.) and add this to a postgresql database using a query, how do i do ...
3
votes
2answers
408 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) ...
3
votes
3answers
2k views

Can someone clear up a lat/long issue? with google maps/arcmap

I know a bit about lat/long, projected and geographic coordinate systems etc, and a bit about geodesy and datums, but I would like someone well informed to help me out. I have a lat-long in ...
3
votes
1answer
3k views

Arcgis Javascript latitude and longitude convert to WGS_1984_UTM_Zone_36N

I am using Arcgis Javascript api. I have two points comes from Google maps like this x:-111.67095840000002 y: 32.7558935 I wanna use this points on my Arcgis map. My map spatial reference is using ...
3
votes
3answers
774 views

Is it possible to check incoming GeoJSON to see if any of the features are identical to existing ones before adding to map?

I am working on a Rails/PostGIS app and doing a typical ajax call to retrieve GeoJSON within the map viewport bounds. Whenever the map is shifted or zoomed all of the markers are removed and then ...
3
votes
2answers
269 views

Where can I get public transportation route information for USA?

I'm trying to find a list of public transit route information, mainly location of bus and train stops for the US. I've looked around at some of the Google products and openstreetmap but can't find ...
3
votes
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
783 views

Client Zoom in OpenLayers with Google layer

I'm displaying some features on a map, but the features are somewhat on the small side and can't be easily viewed at default zoom levels. Using the Client Zoom example, I was able to enable acceptable ...
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
418 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
votes
3answers
966 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
196 views

Way to “rip” bicycle directions from Google Maps Classic?

It's very unfortunate that Google Maps Classic no longer exports routes as a KML file, and Google Maps Engine Lite isn't as easy to use. So I was wondering if it were possible to somehow "rip" a ...
3
votes
2answers
316 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
votes
1answer
3k 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
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
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
1answer
45 views

How to get categorized list of all entities in a particular area of Google Maps/Open Street Maps?

I have been asked by my Professor to get the list of all kinds of entities for a particular area. Here by entities I mean - Names and(or) Addresses categorically resolved to residential area, ...
3
votes
2answers
288 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
3k 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
7k 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
496 views

OpenLayers behaves problematic after certain zoom level in Google Maps Satellite view

I have some polygon data in .shp format to show in Google Maps Satellite view. I can show them well until certain zoom level. But after certain level (zoom level 17 or 18), OpenLayers layer and ...
3
votes
1answer
225 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
378 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
6k 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
156 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
557 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
votes
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
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
237 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
2answers
2k views

QGIS exporting attributes in a KML file

Here is what I am doing: Create a layer by uploading a shape file into QGIS Select Attributes of that file Export selected attributes with the "save only selected features" check box when I save the ...
3
votes
4answers
557 views

where to host private cartodb/leaflet web app

I am looking for opinions on where to host my cartodb/leaflet map site. It needs to be private with authorized users and have a document management system. So, I was thinking sharepoint online 2013 so ...
3
votes
1answer
2k 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
840 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
108 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
619 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
159 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
1answer
550 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
2answers
2k views

WMS GetFeatureInfo and Google maps api V3

Is there a way to request GetFeatureInfo from a WMS service with the Google maps api v3?