Linked Questions

208
votes
4answers
201k 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 ...
42
votes
1answer
19k views

Is WGS84 itself a Coordinate Reference System?

I was wondering the difference between WGS84 and EPSG:4326 (see this). Can then WGS84 on its own be defined as a Coordinate Reference System? Or is it just a datum so that a Coordinate System must ...
15
votes
2answers
55k views

Is WGS84 a Coordinate system or projection system? [duplicate]

WGS84 is often referred to as a "projection system" and sometimes it is confusing to me about what a "projection system" is and where WGS84 falls in one. Could someone please clear that up for me?
5
votes
4answers
9k 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 ...
6
votes
1answer
5k views

Distances in {Plate Carrée projection - EPSG:4326 - WGS84}

"4326 is just the EPSG identifier of WGS84" [3] Indeed http://spatialreference.org/ref/epsg/4326/html/ says it is a GEOGraphic Coordinate System: GEOGCS["WGS 84", DATUM["WGS_1984", ...
2
votes
1answer
2k views

EPSG code for a 3D CRS based on WGS84?

I've been searching for an EPSG code for the coordinates I'm working with: geodetic latitude and longitude (not geocentric) and height above the WGS84 ellipsoid. I don't care about coordinate order. ...
1
vote
1answer
811 views

Non-Earth maps, tile server and scale in leafletjs?

I am looking at putting together a tile server for other astral bodies, such as Mars and the moon. At the moment I am using leafletjs and the Control.Scale at the client end (though could be any ...
2
votes
1answer
555 views

distance difference in Google Earth with exported GPX or KML compared to source shapefile

I've converted a shapefile (points) to KML with QGIS. Points in the shapefile are within 100m distance from each other. When I measure it in Google Earth, the distance changes to 80m. The same ...
2
votes
2answers
97 views

Same EPSG code for different objects

I started recently working in a project where I need to start using EPSG codes to identify coordinate systems and their elements. I saw that a single EPSG code can identify multiple objects. I am ...
0
votes
1answer
231 views

Export GeoJSON files from Targomo

After the Route 360 QGIS plugin stopped working, I developed my own script to handle CSV to GeoJSON travel time polygons. Up until recently, I had been using this page I created to turn CSV files ...
0
votes
1answer
148 views

Google Earth file export query

Can anyone advise me if it is possible to nominate what format Google Earth exports it's .kml file in? i.e. Can you export directly as a UTM file, DDD or DMS file somehow via a selection? At this ...