A group that maintains a freely available database with standard codes for coordinate systems, datums, spheroids, units and the like

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3
votes
1answer
14 views

How to find the actual projection name (code) in a PROJCS text data?

Given a PROJCS data PROJCS["unnamed", GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223560493, AUTHORITY["EPSG","7030"]], ...
8
votes
2answers
250 views

What's the meaning of numbers before an EPSG code, e.g. the 6.9 in EPSG:6.9:4326?

A WFS server I was using offered boundaries data in the following EPSG codes: EPSG:6.9:27700 EPSG:6.9:4326 ...defined in the XML giveCapabilities spec like this: <DefaultCRS>urn:ogc:def:crs:...
0
votes
0answers
25 views

Transform coordinates from EPSG to GOOGLE by Proj4 library

i searched a lot but i doesn't get the correct answer. Maybe someone can help me. I want to transform from epsg 25833 to google coordinates for use it in my android application. The transformation ...
2
votes
2answers
52 views

Projection: conversion of coordinate pairs in Python

Google Translated I am using QGIS and wish to automate the export of a map (an existing project) to which I add a vector layer (representing a construction zone) in pdf format. The problem is: The ...
0
votes
0answers
20 views

How to create a new datum transformation within the ArcGIS REST API?

I'm trying to get a new (EPSG) datum transformation parameter added to the ArcGIS REST API so that I can then get a WKID code for use in ArcGIS Online applications. Does anyone know how to get a new ...
2
votes
1answer
38 views

Converting UTM coordinates to WGS 84

I know the coordinates below are in UTM 36N (due to the EPSG code), and I can convert them with several websites online to wgs 84 and see them in Google Maps. However, been helplessly looking the ...
0
votes
0answers
53 views

Openlayer3: projection to Map.view coordinate system

I have an ol.layer.Tile with ol.source.BingMaps in epsg:3857 and I want add it to my ol.Map with projection 4258. The code below does that but when I display the layer it is rendered in the original ...
0
votes
1answer
22 views

Leaflet Tiling with epsg4326?

i'm using leaflet to render a map on my site. The problem is, i use mongoDB to perform some geospatial queries serverside, which use as standard the infamous epsg4326. It appears that on leaflet ...
1
vote
2answers
58 views

projection from epsg:4326 to epsg:4258

I'm looking for projection functions to convert coordinates in 4326 to coordinates in 4258 and viceversa. Any suggestions?
1
vote
2answers
58 views

Leaflet, changing base map CRS

So i am using leaflet in order to create my project, which is a world map that certain layers would be add on top of it. I am wondering whether I should change the CRS property of the map object, ...
3
votes
1answer
52 views

Differences in the longitude and latitude between a LiDAR DSM and an optical image

I've downloaded the UK's LiDAR elevation data (see below) in laz format for a specific region (Tewkesbury) from: http://environment.data.gov.uk/ds/survey#/download From that, a DSM (Digital Surface ...
0
votes
1answer
38 views

Why distance calculated via pixel size in GeoTiff (EPSG:3857) not equal to Google map or ::skyglyph distance?

I need to understand what's wrong with distance calculated via pixel size. I try to calculate vertical size of GeoTIFF with EPSG:3857. Vertical size in pixels is 4001 pixels and in map units is 2654....
3
votes
1answer
38 views

Default transformation for a EPSG CRS

Is there any way to know which transformation, from available, is the default transformation for a CRS in the EPSG database? For example, EPSG:4230 has more than 30 transformation available and ...
0
votes
0answers
20 views

Get projection/datum from GeoTIFF in C/C++

I am trying to create a GeoTiff importer for an application I'm developing, but for now I am kind of lost. I am using libgeotiff in C/C++, and for now, what I have done is projection points using ...
2
votes
1answer
33 views

Corners of GeoTiff's not lining up after doing gdalwarp EPSG:3006 -> EPSG:4326

I have some GeoTiff's that are in EPSG:3006 (SWEREF99 TM) atm, and I'm trying to convert them to EPSG:4326 (WGS84) because some other software needs it in this projection. But after doing the ...
0
votes
0answers
74 views

Basemap (Matlibplot) not plotting GPS WGS84 coordinates accurately

I have a list of lat,lon coordinates from Flickr pictures taken in Sydney (see here) When I plot these points on google maps, the locations are correct. However when I use my Basemap the results are ...
0
votes
1answer
23 views

GeoServer WMS transformation causing problems!

I am displaying the population density as wms layer with geoserver 2.8 in tomcat8. As you can see in the screenshot, there are some strange borders where are no values in the tiff file. Can anyone ...
6
votes
1answer
147 views

Why isn't QGIS detecting CRS from .prj file?

I have a number of 1 km hexagonal grids that cover various counties in the United States in a postgreSQL/postGIS database. Each grid has the CRS EPSG:3857, and the counties layer has EPSG:3857. When ...
0
votes
1answer
46 views

How to know what is the correct ESPG code for clipping Landsat imagery?

This is somewhat related to a previous question of mine. My goal here is to clip Landsat imagery to a rectangle that I've defined by four points of latitude and longitude in WGS84. To do this, I've ...
1
vote
2answers
268 views

What is the proj4string of the Lambert azimuthal equal-area projection?

Shapefiles of European data are available on the Eurostat website. I have loaded the NUTS_2013_60M_SH Shapefile in R with the command; europeRG <- readOGR(dsn = patheurope, layer = "...
3
votes
2answers
65 views

What is the epsg code of eurostat maps?

Shape files of Europe maps are available on the Eurostat website. I downloaded NUTS_2013_60M_SH. The tool (readOGR from the R package Rgdal) I use to load the map shows the following proj4string: "+...
4
votes
0answers
78 views

How to choose the EPSG projection?

Up until now for reprojection of my WGS84 vector (.shp) and raster files (.tif), I have been using EPSG projections based on vector/raster central point's UTM zone. But what happens if the envelope-...
2
votes
0answers
55 views

proj4js with geocentric CRS

I am developing a little web app to transform coordinates between CRSs. To do that I am using proj4js, but I notice that proj4js can't work with geocentric CRSs. Is there another tool similar to ...
2
votes
0answers
60 views

Determining EPSG code for coordinate transformation using ArcPy? [closed]

I am trying to write a Python script which will identify the EPSG code for the coordinate transformation. I am familiar with the dataFrame.geographicTransformations function, however this returns a ...
1
vote
1answer
292 views

How to quickly change EPSG in QGIS (Openlayers; 4326 vs. 3857)

I'm using Qgis 2.12.2-Lyon on Ubuntu 14.04 LTS. With the OpenLayers plugin I added some OpenLayers to my Canvas. I usually use the WGS 84 (EPSG:4326) projection for my project, but I have to switch ...
1
vote
1answer
62 views

Foreign Key error, creating new splite db?

Attempting to use a plugin in QGIS (midvatten) that utilizes splite. I am attempting to create a db in a different EPSG than the plug in defaults to, im getting "foreign key constraint failed" as my ...
1
vote
0answers
124 views

In OpenLayers 3, transformExtent to EPSG:8155 produces error

I'm trying to get the extent of a map using OpenLayers 3, so that I can use it in a CQL filter to limit the area of the WMS request to the area currently shown in the map extent. To do this, I have to ...
1
vote
0answers
62 views

Projection Issues - OpenLayers / MapServer / NAD83 State Plane FT

I am having projection issues with OpenLayers version 2.13 with MapServer and the Proj4 library. Pulling layers in NAD83 State Plane Feet projections on top of an OSM or MapQuest Base Map in Google ...
0
votes
1answer
56 views

wrong coordinates for wfs MultiLineString from geoserver

I have a leaflet application and I want to display some WFS layers coming from Geoserver. In Geoserver, I declare my layer with a "native SRC" EPSG:2154, and with a "declared SRC" EPSG:4326 and set "...
0
votes
1answer
588 views

OpenLayers 3 display wfs EPSG:4326 on EPSG:3857 map

Is it possible in OpenLayers 3 to project an EPSG:4326 wfs vector layer on to say a MapQuest EPSG:3857 map? I've tried the following code (modifying this example Open Layers 3 wfs example, but the ...
7
votes
2answers
241 views

What is the difference between spatialreference.org catalogs: EPSG, ESRI, and User-defined?

I'm trying to understand EPSG codes. I've been to the spatialreference.org site, and in its "about" link, it states: "There are currently three distinct catalogs of spatial reference systems on this ...
2
votes
1answer
144 views

Is it possible to visualize EPSG:102020 and EPSG:3857 at same time in QGIS?

Is it possible to visualize EPSG:102020 and EPSG:3857 at same time in QGIS? If is possible, how? Why some EPSG permit on the fly transformation and visualization and other don`t?
1
vote
1answer
35 views

Get pixel geo info according projection and map extent

I would like to know if it is possible to calculate the geographic coordinates (lat, lon) for a pixel specified by its x/y (top-left) cartesian coordinates in a map image/raster? The datum and ...
0
votes
1answer
296 views

Transforming from EPSG:2154 to EPSG:3857 using ProjNet4GeoApi/Proj.net, C#

I don't have much experience with GIS. Here's are my projections defintion: private Dictionary<CoordinateSystemStrings, string> CoordinateSystemStringDictionary = new Dictionary<...
2
votes
2answers
94 views

What is the SRID for EPSG 102743?

I am trying to create a table in PostGIS for some LiDAR data and I need to set the the_geom column to my data's SRID. My data is in EPSG 102743, but when I try to use 102743 as my SRID as the_geom I ...
0
votes
1answer
93 views

Converting from lat/long to EPSG:2154 using ProjNet4GeoAPI?

I'm not experienced with GIS. I received long/lat data and need to convert them to GIS. Here are code examples from the library ProjNet4GeoAPI : https://github.com/NetTopologySuite/ProjNet4GeoAPI/...
2
votes
1answer
176 views

Converting from lat/long to EPSG:2154, in C#?

I don't know much about GIS. I'm working in C#. I'm receiving latitude/longitude data and need to convert them to EPSG:2154. I've done some web search but I'm still not sure where to start. Is there ...
0
votes
0answers
119 views

published raster with custom coordinate system to geoserver (comes in as EPSG 404000), but it won't overlay with other layers?

I have an ecw file that is an aerial photo in a custom coordinate system. When I publish to geoserver, it specifies the EPSG as 404000. It seems like this isn't actually storing the coordinate system ...
2
votes
2answers
208 views

Why is my EPSG:3068 to WGS84 projection not accurate?

I need to project EPSG:3068 (Soldner Berlin) to lat/long. It works fine with https://epsg.io/3068/map, but I'm looking for a way to do it with a Python script. I tried both pyproj and the epsg.io ...
0
votes
0answers
100 views

Saving shapefile using GeoTools?

This is my first time dealing with the GeoTools library and not sure how to troubleshoot the issue. I am trying to save a shape file using the library but I get the following stack trace: java.lang....
1
vote
2answers
82 views

How to show two layers with different projections in QGIS

I have a shapefile that define X and Y in meters, not lat and lon. Then I have another file (CSV) that stores points locations as lat and lon, e.g. 30.4, 2.2. I want to load these two files as two ...
0
votes
1answer
168 views

layers don't match on OpenLayers

So in my Openlayers 3.9.0 I use Bing Maps and OSM layers, they both are EPSG 3857 var layer = new ol.layer.Tile({ source: new ol.source.OSM({}) }); var bingMapsAerial = new ol.layer....
2
votes
1answer
117 views

Why don't some EPSG have proj4?

I was looking into PostGIS and its defined Spatial Reference Systems, and I found that some have no proj4. Why don't they? SELECT auth_name || ':' || auth_srid, proj4text FROM spatial_ref_sys ORDER ...
1
vote
0answers
51 views

opengeo suite sdk gxp EPSG

I am working in a viewer with suite sdk gxp and I can see my layers, but some of them in the viewer are located wrong. I have checked postgis and geoserver and every layer is ok with the same EPSG, ...
0
votes
1answer
66 views

What is the type of EPSG of longitude/latitude (not Point) co-ordinates?

I want to know that what is the type of projection (900913, 4326 or so on..) of long/lat co-ordinates. I happen to come across a slight confusion while querying planet_osm_lines when I dump (...
0
votes
1answer
241 views

Converting EPSG:28992 to universal (Google Maps) lat/lon

I'm trying to find a way to convert EPSG:28992 to Google Maps' lat/lon using PHP. Is this possible? I'm trying to convert XYZ: 137634.397 455715.439 0.0. I'm using Kadaster, which is a Dutch ...
2
votes
3answers
122 views

How to find the extent of (many) EPSG CRSes?

I want to map the geographic extents / bounding boxes of a lot of EPSG CRSes. At least, those with a rectangular geographic extent. For example, take epsg:2004, visiting that page shows the extent (...
0
votes
1answer
40 views

How to display EPSG:32649-WGS 84 image on EPSG:4326 map in ArcMap?

I have a image has EPSG:32649 coordinate system and I wanto display this image on a EPSG:4326 map on arcgis desktop (arcmap) . Any one can help me?
0
votes
0answers
29 views

Wrong axis order in geotools crs when reading from EPSG:4326 [duplicate]

Map<String,Object> params = ...; // postgis params DataStore dataStore = DataStoreFinder.getDataStore(params); SimpleFeatureCollection collection=...;// collection to save SimpleFeatureType ...
1
vote
2answers
48 views

Is publishing geodata in unprojected latlon coordinates better than a local UTM projection?

This is meant as some kind of reference Q&A. Unless I am working with truly global data, I always prefer projected, local, metric coordinates so that calculations like area or distances are "...