Questions tagged [google-maps]

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

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185
votes
4answers
175k views

EPSG 3857 or 4326 for GoogleMaps, OpenStreetMap and Leaflet

The discussion at What is the difference between WGS84 and EPSG4326? shows that 4326 is just the EPSG identifier of WGS84.. Wikipedia entries for Google Maps and OpenStreetMap shows that they both ...
165
votes
5answers
371k views

Adding Basemaps from Google or Bing in QGIS?

ArcGIS Desktop has the option of using basemaps from ArcGIS online. Does QGIS have any such options?
54
votes
6answers
35k views

Why is the 'straight line' path across continent so curved?

This is the result of mapping the straight line path from a point in US to Poland using Distance Measurement Tool. Also, planes from Asia to US would travel almost over North Pole. Why is the path ...
95
votes
12answers
246k views

What ratio scales do Google Maps zoom levels correspond to?

Can anyone provide me with a link (or some details) on the actual ratio to "zoom level" figures for Google Maps? e.g. Google Maps Level 13 = 1:20000
43
votes
2answers
31k views

What is the difference between EPSG:900913 and EPSG:3857?

I'm using the QGIS google layers plugin to digitize a parcel as a shapefile. Later I want to import it to PostGIS. I know that google maps use a special 'google mercator' projection. What is the ...
11
votes
2answers
16k 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 ...
8
votes
2answers
40k 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, ...
10
votes
4answers
1k views

Suggestions for simple mapping platform for alumni web site

I'm working on a proof of concept alumni site with a WordPress backend. I want to have a very simple map that shows where alumni are living. I'm thinking something like the Bing API or a simple open ...
6
votes
4answers
6k views

Misplaced Google Maps with OpenLayers plugin in QGIS?

I was using Google Maps with OpenLayers plugin in QGIS with my vector layer with projection EPSG:4326 with google map projection EPSG:3857 and "on the fly" transformation enabled. It was matching ...
22
votes
5answers
18k views

Map projection in OpenLayers

I want to overlay some data whose projection is WGS-84 on Google map layer in OpenLayers. But I just can't make them in the right place. I did as follows: map = new OpenLayers.Map('map', { ...
11
votes
4answers
4k views

Performance of google map tile creation processes

I know that question is rather vague but please bear w/me. I'm trying to get an idea of what sort of product performance - specifically timing - people have seen for various methodologies they have ...
7
votes
1answer
10k views

Transforming EPSG:3857 to EPSG:4326

I am new to gdal and have a simple question. I want to transform an image from OpenStreetMap projection to Nasa Blue Marble projection. What I understand is that OpenStreetMap projection is EPSG:3857 ...
8
votes
7answers
19k views

Can you make a travel region polygon with with Google Maps API? [closed]

I am working on a local design project and need to determine if someone is local to my area to allow them to participate. Local, as defined by the group, means that the person is within 2 hr driving ...
7
votes
2answers
11k views

Using Google Maps as layer in ArcMap?

Can I use Google Maps as a layer in ArcMap? Is it possible?
11
votes
3answers
2k views

In what coordinate systems do true circles appear round?

I have been developing in Google Maps for awhile and am switching to OpenLayers but am stuck on one point: I am drawing vectors that are mostly circular but also involve some custom geometry so I can'...
6
votes
2answers
11k views

What is Google source for United States topographic data? [closed]

I'm looking for as detailed as possible topographic data for a certain area and have found information displayed by Google Maps to be far more detailed than what is provided by 7.5 minute maps (from ...
29
votes
6answers
55k views

What's next if our KML is too big/complex for the Google Maps API? [closed]

Our web app includes simple mapping capabilities (currently just markers and KML overlays on an embedded Google Map). This works pretty well; the only real limitation we face is KML overlays that go ...
9
votes
3answers
35k views

Which CRS to use for Google Maps?

I am trying to map a Shapefile (download) onto a Google Map using the Javascript API. The Shapefile describes the boundaries of NYC School Districts. The file's projection was Lambert Conformal Conic,...
13
votes
4answers
78k views

Creating drive time polygon around map point? [closed]

I'd like to create a 30 min drive time polygon around 400 separate points I have plotted to google maps. I have discovered http://www.freemaptools.com/how-far-can-i-travel.htm but this seems to freak ...
8
votes
1answer
8k views

Understanding the difference between coordinates projection in OSM and Google Maps in China

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 ...
4
votes
3answers
9k views

OpenLayers plugin in QGIS 3.6

I can't find OpenLayers Plugin to install in QGIS 3.6. I want to open Google Earth in order to add coordinates and open satellite image to start mapping.
3
votes
1answer
239k views

Adding new address to Google Maps? [duplicate]

I can't see my home address on Google Maps as it is a new neighbourhood. How can I get my home address added into Google Maps?
44
votes
3answers
17k views

What is the current Web Mercator projection code?

The web mercator projection, popularised by Google Maps, seems to be given a new EPSG code every couple of years. EPSG:900913 (Google in calculator text) was an unofficial code EPSG:3785 - is the ...
25
votes
6answers
13k views

Geocoding API Comparison

Is there a good updated source for comparing existing Geocoding APIs (i.e. Google, Mapquest) and their features? I'm really interested in their language support as well. For example, Google has ...
55
votes
4answers
13k views

Why has Web Mercator (auxiliary sphere) become the web map standard?

I understand what the difference is between the Web Mercator projection and Web Mercator Auxiliary Sphere (WMAS). I also understand that both Google and Esri have adopted this projection as their ...
10
votes
6answers
22k views

Openlayers v4.0.1 support Google Maps Javascript API?

I want to know if the latest version of Openlayers (v4.0.1) supports Google Maps as a Tile Layer. I can't find any document ion about this. If Openlayers doesn't support Google Maps, could someone ...
14
votes
5answers
2k views

Quality of free geodata compared to commercial sources

What are the sources of excellent geo-location data as possessed by Google Maps ? I am wondering that, even with large amount of volunteer work involved, why is OSM data not comparable to theirs in ...
12
votes
4answers
18k views

Geocode address once in google maps, save in database, read geocoded result from there on

Is it possible to geocode an address, save the result in a database, then read that result from there on? I'm using a Google map that is geocoding hundreds of addresses which obviously hit the ...
9
votes
5answers
2k views

Buffers of public transportation transit times

I'd like to be able to create buffers/zones/rings of transit times using Denver's public transportation system. For an example of what I'm talking about, check out triptropnyc.com - I don't need it ...
18
votes
2answers
24k views

Which is correct projection in ArcGIS Server for EPSG:3857/900913?

I want to publish a mapservice in ArcGIS server, which will be overlayed on Google Maps or Bing Maps. For this, the Map Service needs to be in EPSG:3857/900913. The Google Maps projection is supposed ...
11
votes
2answers
65k views

Coordinate system and projection for georeferencing Google Maps image in ArcGIS Desktop?

I have saved Google Maps image (not Google Earth) of area at latlon(17.692437,83.218689) by some method in jpeg format. It is an exact snapshot of the Google Maps. Now I need to geo-reference it to ...
12
votes
1answer
11k views

Determining if two polygons are overlapping in Google Maps?

I'm working with google maps and polygons, but I have to validate that polygons are not overlapping each other. I have a function that returns TRUE when a point (lat, lng) is inside a polygon, but it'...
10
votes
4answers
6k views

What causes shiny artifacts in Google Maps imagery?

Do you know what causes artifacts like this one? Source: http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=embelgasse+wien&aq=&sll=37.0625,-95.677068&sspn=60....
5
votes
3answers
3k views

Does a national(USA) interstate rest stop/rest area dataset exist?

And I don't care about format--worry about that later! I found some maps in Google maps, usually per state. I also have one map made my someone else, that no longer appears in the Google Maps search ...
5
votes
3answers
5k views

QGIS 3.0 XYZ Tile 'OpenStreetMap' Text is Too Small to See

I installed QGIS 3.0 (standalone 64 bit installer) and added the standard XYX Tile layer 'OpenStreetMap' that was part of the install. It loads fine except the text is too small to see. Not sure if ...
4
votes
4answers
19k 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 ...
5
votes
4answers
8k views

In what coordinate system and unit measures the coordinates returned by the Google Maps API are?

In what coordinate system and unit measures the coordinates returned by the Google Maps API are? I ask this because I have a page that returns the geocode lat / long for me to find in my postgis ...
4
votes
1answer
21k views

Highlighting area in Google Maps 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 to ...
8
votes
3answers
108k views

House address is not listed on Google Maps

When I search for my address on Google Maps it cannot be found which means I can't order takeaway etc. Is there a way of adding my address to Google Maps or even add a street address? I want the ...
5
votes
4answers
12k 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 ...
5
votes
2answers
9k views

How to display a PostGIS table on Google maps?

I am attempting to take a shape file and display it on a map: I can do something like this: SELECT ST_AsText((ST_Dump(the_geom)).geom) as the_geom FROM shapes; But the problem is I still have to do ...
3
votes
2answers
3k 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 OSM/...
7
votes
3answers
24k views

Outline a plot of land on a map

A client has a very old Certificate of Ownership document for a plot of land. We need to show the outline of the plot on Google maps to potential developers. Sadly the description of the plot is in ...
5
votes
1answer
754 views

Can I use QGIS plugins in PyQGIS as a stand alone script without iface?

Can I use a qgis plugin especially (openlayers plugin) in stand alone pyqgis script? I don't find examples, just code using iface but that cannot used in stand alone script.
4
votes
3answers
5k views

Plot Canadian (Alberta Province) township, range, and section data on Google Maps

We are working on a project where we need to plot some part of Canada (Alberta) over Google Maps. We can plot maps on Google with coordinates (lat/long) or geometry values. But our client provided us ...
4
votes
3answers
28k 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 ...
4
votes
2answers
3k views

Exporting layer from Google My Maps as KML has no geometries

I have a CSV with an address field (no lat/long), so I went to Google My Maps, imported the csv and geocoded of the records. Now I export the layer as KML and added the KML to QGIS and Google Earth ...
4
votes
2answers
10k 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 ...
3
votes
2answers
8k views

How to disable Google map zooming animation effect?

I am using Openlayers mapping library in my application. I have integrated Google map V3 & added other several WMS overlays, Vector layers etc. Every thing working fine. But I am facing big ...
2
votes
1answer
20k views

Downloading Points of Interest from Google Maps?

Is there any legal way to search and download google maps POI information, based on user location and search radius (50 km) + search criteria (eg restaurant) ? Output would ideally be KML or CSV.