Tagged Questions

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

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4
votes
2answers
1k views

What formula is used for distance between 2 points in Google Maps?

What formula is used by Google Maps for calculating the shortest distance between 2 points (having their Lat, Lng coordinates)? Is it purely based on Haversine? Or is it something different? Is there ...
3
votes
2answers
119 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 ...
1
vote
1answer
194 views

CartoDB data not displaying on Google basemap

I'm new to CartoDB but hoping to use it to display various types of real estate data on my website. That said I've been playing around with some of the sample code (Google Maps V3 integration example ...
2
votes
1answer
836 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 ...
4
votes
2answers
2k views

Create Fantasy Map

I'm currently looking to create a Fantasy map and share it with my friends. We have the map designed already in flash to certain degrees of detail and able to export as a vector. We'd like it to be ...
1
vote
2answers
169 views

KML problems on Google Maps

If I upload my KML file, which contains polygons and pins, to Google Maps, then most of the polygons are missing (see below). To try and address this, I pasted the kml url to the Google Maps search ...
-1
votes
2answers
587 views

Google Map geocoder returns multiple results against a complete town name (with county, state)

I have the following address: "Chelsea, New York, NY, USA" In the above address: City = 'Chelsea' County = "New York" State = "NY" Country = "USA" When i pass this address to the Google's Geocoder ...
0
votes
1answer
1k views

Sample JSON code to get latitude and longitude values from Google API geolocation

I'm a fresher in JSON coding. I got a sample Google API geolocation console from https://developers.google.com/maps/documentation/business/geolocation/ site. {'cellTowers': [ { 'cellId': ...
1
vote
1answer
193 views

overlay wfs google in openlayers

map = new OpenLayers.Map('map', options); // BASELAYER var google_maps = new OpenLayers.Layer.Google( "Google Maps", { numZoomLevels: 20 } ); var ...
2
votes
2answers
1k views

Polygon country boundaries in decimal degrees

Using Google Maps, I'd like to create draggable polygons (on the fly) of country boundaries (they don't need to be particularly precise). Something similar to this, but for countries. So I want the ...
0
votes
1answer
352 views

Scale parameter of the GetMap function within RgoogleMaps

Within the R library called "RgoogleMaps", there is a function called "GetMap" which is used to save a georeferenced image file. The library's manual suggest that the SCALE parameter supposed to be ...
1
vote
1answer
620 views

Adding multiple layers in CartoDB using createLayer() not working

Using CartoDB (cartodb.js 3.5.02), it seems like you should be able to add multiple, independent tile layers to an instantiated Google Map. I've tried using createLayer() a number of ways, using both ...
3
votes
1answer
160 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, ...
0
votes
0answers
98 views

Can I simplify polygons in QGIS by Size?

Just wondering if it's possible in QGIS to simplify polygons based on size? I've done it many times using the tolerance level to reduce the overall size however in this case each polygon cannot be ...
1
vote
0answers
284 views

Updated: Openlayers Vector Layers with Google Map Base Layer (via Grid): Vectors Stick but can't get correct resolution/projection

Revamping this question instead of opening a new one. Previous issue: vector layers were not "sticking" to the map, so when you would zoom in or out the vector layers would "come out" at you. Note ...
0
votes
1answer
140 views

openlayers Googlemap and custom wms

I have a custom wms server the transform for this wms is UTM and i cannot set googlemap layr for background for example my feature in wms is Iran country but googlemap background is Algeria this is ...
0
votes
0answers
41 views

Title data from KML/SHP to google maps

Im trying to take land title data from a Shape file and convert it so it will display on Google maps. Works fine going to Google earth I can get the plots and be able to select each one and pull up ...
0
votes
3answers
152 views

Get google maps small portion for offline application

Can some body help me in downloading some portion of hybrid maps of google as I want to store them in my server and display them on web application using openlayers so that the user will only have ...
1
vote
2answers
937 views

Drawing aerial routes for flights on Google Maps API between two markers?

I have been drawing route till now using DirectionService. But now my current requirement is to draw a route on air.I did some research and found this link which helps us to draw curved polylines ...
1
vote
1answer
2k views

Using Google Tiles on LeaftLet

I would like to use the Google tiles on LeafLet (RoadMap, Satellite,...). I've tried this https://github.com/shramov/leaflet-plugins and it works fine, but I'm worried about the possible legal ...
0
votes
0answers
150 views

Openlayers using google maps as base layer have offset on WMS layer when zooming out

I have WMS layer with points (EPSG 4326) on a base google map layers. I've noticed when I zoom out , the wms layer is offseting to the left. Max zoom in , this is the correct position : Zooming out ...
2
votes
0answers
477 views

Google Maps Engine Connector error

I have recently installed the Google Maps Engine Plugin for QGIS 2.0 and it doesn't seem to work. Whenever I click on the Log in button it pops up with: Google Error:invalid_client Bad request. ...
2
votes
1answer
856 views

Google maps layer as the base layer and WMS as overlays shows empty map

I have a problem of showing my base layer which is Google Maps. The browser console reports "Uncaught TypeError: undefined is not a function" in var google_streets = new ...
1
vote
2answers
671 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 ...
0
votes
1answer
319 views

how to get the boundaries of a city in KML from google maps

im trying to write a google maps application. and i wanted to only highlight one city in the world ( im using the masking method explained: https://github.com/vasile/geomask) but now im bugged with ...
3
votes
0answers
127 views

How to display Google Fusion Table map search result attributes

I am creating a map with Google Fusion Tables that will allow me to search for a local food product and display on a map the retailer that carries it. Along with showing on the map the location of ...
-1
votes
1answer
833 views

Retrive data from database in openlayer GIS

i am using this code but it shows nothing, whats wrong with this code. <!DOCTYPE html> <html lang='en'> <?php $conn_string = "host=localhost dbname=postgis_21 user=postgres ...
3
votes
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 ...
1
vote
0answers
505 views

Postcode Boundaries : India

I was wondering if there are shape-files for postcode regions in India. I did find some shape-files that give the outline of the administrative units in the country but not with postcodes. Right now ...
2
votes
0answers
262 views

Calculate Width and Height of a Google Static Maps Image

Do you know how to calculate the width and height (in degrees minutes) of a Google Static Maps image? I’ve found it extremely difficult. The only information you have is: - The centre of the image ...
1
vote
1answer
535 views

Export KML from points plotted in javascript Google Maps API?

I want to export a KML file from points plotted in Javascript using the Google Maps API. Is there a way to do this? The user logs in and checks Google Maps, then plot points on the map and finally ...
1
vote
1answer
222 views

Why are KML/KMZ parts missing after upload to Google Maps?

I have a problem with a KMZ file uploaded to my Google Maps places: As you can see I have a polygon KMZ file (converted from a shape file in ArcMap) that has 12 parts but the Google Maps shows only ...
0
votes
1answer
91 views

Finding the latitude/longitude that is in the middle of 2 others?

Ok, so I will have a system/application that will always at the most have 2 points (latitude/longitude) on a map per street. So if the user wants to add another point on that street I want my app to ...
2
votes
1answer
618 views

Postgis | Problems Reprojecting a Point from UTM ED50 to GEOGRAPHIC ETRS89

I've got a POINTS PostGIS table in the 23030 (ED50 UTM 30N) SRID. I'm having a lot of problems trying to reproject those points from ED50 UTM coordinate system to ETRS89 Geographic (lat/long) ...
2
votes
1answer
116 views

Make Google Analytics city data showed on the Google map

I use the Google fusion table to table to mark city on google map, but there are about 20~25% which quality is ambiguous. How to make the ambiguous data precise? Here is my finished map (scroll down ...
1
vote
3answers
1k views

Formula/ calculation for ESRI map coordinate conversion (meter to decimal degrees)

I'm new to ESRI mapping. I have a set of points in ESRI, with x, y, z coordinates, which I believe is in meters. I am now writing an Android program, and I do not want to depend on ESRI, thus I would ...
3
votes
2answers
276 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 ...
1
vote
0answers
1k views

Google map did not update new geolocation when I moved the marker to new position

This is my google map code. I'm trying to update new latitude and longitude when i moved the existing marker to new position. But I don't understand why the following google map code is not updating ...
2
votes
1answer
77 views

Road Miles Calculation without Google Maps

We have two ZIP codes we want to calculate the road mile difference. Google maps states you cannot use their API if you do not show a map. Is there another service that provides this type of ...
5
votes
3answers
429 views

How to simulate google maps user experience

I’m not familiar so much with GIS applications and libraries. There is something that I would like to know if it’s possible or not. We are using ESRI suite of products as our GIS infrastructure. We ...
1
vote
4answers
535 views

Rendering temperature on google maps

I have a number of data points in the form of (latitude,longitude,temperature). I am required to render the temperature on a map. The final result should be similar to the the map here I used ...
0
votes
1answer
272 views

Transit Option not working in Google Maps

I have a requirement to create an application which would show public transport routes between a source and a destination which i acheived it successfully. But i found that the transit routes does not ...
1
vote
1answer
594 views

Transit Directions: Preferred Vehicle Type?

I would like to be able to get transit directions through the JS api, that is limited to a single vehicle type (e.g. Bus). This functionality is available on maps.google.com, but how do i submit the ...
1
vote
4answers
1k views

OpenLayers - Can't remove zoom control buttons, other controls simply lay on top

I have a simple OpenLayers script with a Google map as the base layer. By default the map has a + and - zoom control button, which I can't find how to get rid of. I've added an empty controls array ...
0
votes
1answer
2k views

Loading WMS Tiles on Android using Google maps v2

I'm using Google Maps v2 to display tiles from a wms. I referred this site. Problem in loading tiles, tiles are loading multiple times i dont konw y? Can any1 help me. Here is my code package ...
1
vote
1answer
321 views

Drawing polygons with Google Maps using local shape data

I am trying to draw a census tract on a Google map. It looks like Google Maps lets you draw polygons using longitude and latitude coordinates. However, the data that I have is not ...
0
votes
1answer
92 views

GeoReference use wordfile in arcgis [duplicate]

I have a tiff image and have the required information to Geo-reference it on the MAP. which called world file like this. using GMAP.NEt API there are many limited functions not like the java script ...
1
vote
0answers
172 views

Open Layers map shows partial map on page load, unless dev-tools are opened [closed]

I have a Open Layers map with a few KML layers being added dynamically on top of it. On page load I see only a part of the map in top left corner of designated html div. I can't figure out the source ...
1
vote
0answers
228 views

Google StreetView Coverage Layer

How can I get the layer of the coverage of Google Street View on the roads, i.e. the layer that appears blue when we drag the pegman on Google Maps/Earth? I need it to work in ArcGIS. Thank you.
3
votes
0answers
271 views

R with ggplot2/ggmap - How to load a png image as a map

I am trying to find a workaround for ggmap's missing support of world maps (i.e. you can't create any maps that show latitudes > 80°, due to idiosyncrasies in the mapproj package). To a limited extend ...