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Questions tagged [epsg]

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

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GeoTools MapFrame statusbar set reference system list empty

I'm using geotools.version = 20.0. I've included the gt-epsg-hsql dependency and the org.apache.maven.plugins.shade.resource.ServicesResourceTransformer transformer in my pom.xml file. I tried ...
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Transforming azimuth from EPSG:5514 to WGS84

While showing points on map, I also have to show their heading, given in azimuth, however S-JTSK 90° is not equal to WGS84 90° and I can't seem to find any formula, that would allow me to transform ...
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1answer
29 views

For what ist the epsg-file in the “share/proj” subfolder of the QGIS - installation used for?

In the "share/proj" subfolder of the QGIS-installation there is an epsg-file with definitions of the epsg-codes like this: # DHDN / 3-degree Gauss-Kruger zone 3 <31467> +proj=tmerc +lat_0=0 +...
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+50

Integrating NTv2-transformation in QGIS?

I am wondering what's the correct way to integrate a NTv2-transformation in QGIS. I have successfully integrated a NTv2-transformation in QGIS but I am not sure if it's done the way it's meant to be. ...
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1answer
259 views

Why do 2 EPSG Codes exist for the same coordinate system?

I sometimes need to publish data in Gauss-Kruger zone 3 and was wondering why there are now the following EPSG Codes which define this CRS. 31467 - DHDN / 3-degree Gauss-Kruger zone 3 31463 - DHDN / ...
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1answer
45 views

ProjNet. Coordinate reference system transformation deviation

I have a project with C# that contains a CEFSharp viewer showing a webpage with a map that I've created.I'm trying to add a marker in the map sending the parameters from C# to a function in the ...
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1answer
29 views

Identify EPSG in SQL Server

I have been trying to load a shapefile available at https://www.elections.on.ca/en/voting-in-ontario/electoral-district-shapefiles/open-use-data-product-licence-agreement/download-shapefiles.html to ...
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ERROR 6: EPSG PCS/GCS code 102027 not found in EPSG support files

I am trying to insert spatial data from GeoJSON to PostgreSQL database and before it I am to reproject geom from EPSG:4326 to EPSG:102027. When working on Windows there were no problems with CRS, but ...
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2answers
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How to Update the EPSG Database of Gdal on Ubuntu?

I have a Ubuntu 16.04 Server, with GDAL 2.1.3, released 2017/20/01. I need to project a Raster to EPSG:7755 which was added way back in 2016. When I use this EPSG code with gdalwarp, I get the ...
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1answer
46 views

EPSG conversion and image rotation in folium

I'm using Python's folium library (which uses Leaflet) to display images over a map. However, my original data uses EPSG:3035 and folium uses EPSG:4326 (WGS84). There is a rotation when converting ...
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Reprojecting trouble: shapes saved in one EPSG load as another EPSG in QGIS and are 200m off?

I'm in a mixed working environment with some ESRI licenses and several people working with QGIS. For a project, we created data and received data in EPSG 31468 (Gauß-Krüger Zone 4). We now need to ...
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30 views

EPSG Geodetic Parameter Registry - SW supporting transformation EPSGs

The page www.epsg-registry.org contains EPSG codes for different transformations (i.e. EPSG:1173, EPSG:1244 etc.). Do you know about some GIS SW (online or desktop), which supports converting ...
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1answer
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Exporting shapefile layer to KML and CRS specification in QGIS

I've been trying to learn the ins and outs of QGIS for several years now. I am somewhat familiar with the software but certainly not an expert. I have recently downloaded a section of the Canadian ...
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1answer
69 views

How does PostGIS project from 4978 to 4326?

I have data in EPSG 4978 (3D Cartesian XYZ using WGS84) and just for kicks, I tried projecting it to 4326 (lon, lat 2D using WGS84). I expected an error but lo and behold, I got a point back. Here's ...
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Importing Shapefile into PostGIS and EPSG of created table is different from Shapefile?

I'm trying to import a Shapefile into PostGIS using the ogr2ogr, but it seems that the OGR is not automatically getting the EPSG from Shapefile. My Shapefile has EPSG 4618, but the table created by ...
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1answer
63 views

Incorrect distances/area using Python and Shapely

I have a PostGIS table holding cadastral (property) data stored in SRID 3857 (Web Mercator). In Python I want to calculate the length of polygon lines and the area in metres and sq metres respectively....
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30 views

POSGAR CRS With Reversed X and Y coordinates

I've been working in the Argentine CRS of POSGAR (Specifically POSGAR 94/Argentina 2 EPSG:22182) frequently and have noticed on a number of occasions that coordinates are provided to me with the X ...
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1answer
120 views

Geopandas Proj4 reproject to global equal area projection

I have a geoDataFrame with crs {'init': 'epsg:4326'} The data has a global extent and my goal is to calculate the area (in m2) per feature. Therefore I want to reproject the geoDataFrame using the ...
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1answer
68 views

PostGIS: EPSG 3857 magic number?

When I'm using PostGIS for transforming coordinates from WGS 84 (EPSG 4326) to Web Mercator (EPSG 3857) the result for POINT(-180 0) is POINT(-20037508.3427892 -7.08115455161362e-010) and for POINT(...
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Reprojecting EPSG:5514 to EPSG:3857 for use in Leaflet

I have one JPG (170 MB) and JGW file of a small area projected in EPSG:5514 (Image provider told me.) JGW file: 0.1250000 0.0000000 0.0000000 ...
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1answer
30 views

Saving Shapefile - Zero Features Error

I am using QGIS 3.02. I opened a GDB file in QGIS and saved it as a shapefile in EPSG: 4326. Now I want to save it in EPSG: 2264 but I am running into an issue. Every time I save it as EPSG: 2264 the ...
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1answer
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Why ogr doesn't read this kind of prj

I run the code below, that I would hope to return the parameters from projection file (.prj). However it doesn't work as I would expected. I realized that the it isn't working because the some ...
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1answer
50 views

Extract lat/long from GeoTIFF with Mercator CRS

I have a GeoTIFF file and with gdalinfo command I found the following info: Size is 1200, 1400 Coordinate System is: PROJCS["unnamed", GEOGCS["WGS 84", DATUM["WGS_1984", ...
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105 views

What is the projection of my raster?

Continuing what is written in this post, I show gdalinfo output Size is 1200, 1400 Coordinate System is: PROJCS["unnamed", GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",...
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1answer
187 views

Reprojecting EPSG:3412 to EPSG:4326 using GDAL?

I want to reproject "South polar stereographic" projection to "gcs WGS 84". I have tried the solution given to Re-projecting from Polar projection to EPSG:4326? through this commands I am getting ...
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1answer
83 views

Coordinate transformation results are different between Proj4JS and pyproj

I try to make a coordinate converter using Proj4JS for mobile app, I use this source code. Before I tested conversion for WGS84 geographic and WGS84 UTM, there was not problem with it. I tested ...
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1answer
42 views

Selection of Projection for a small scale project

I'm quite unsure if this is the right place to ask but I would like to have some advice from experts. I'm working on a QGIS project in a small area in the south of Portugal. I've been questioning ...
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1answer
39 views

What CRS is used in historical maps on IEG-MAPS

Do anyone know what coordinate reference system is used in set of historical maps of Europe from Leibniz Institute of European History Below sample map from set
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2answers
77 views

Choosing CRS for metric distance calculations? [closed]

I have the following ArcPy script to calculate total length of Polylines in a Feature Class/Shapefile: arcpy.Project_management('lines.shp', 'lines_projected.shp', arcpy.SpatialReference(TODO EPSG ...
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1answer
126 views

Formula for transforming from EPSG:4326 to EPSG:3003 or EPSG:3004

This system is used in Italy. I came across this: It says that lambda zero is 9° if it's to epsg:3003 otherwise if it's to epsg:3004 it's 15° I came up with this Java code, but the result is wrong: ...
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59 views

Leaflet points off from correct spot on map

I am working on updating our map from OpenLayers 2 to Leaflet. I have my own set of tiles that are working correctly on OL2 but on leaflet any point I draw seems to be incorrect (further south and ...
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1answer
430 views

Google Earth Engine Reprojection to non-EPSG defined CRS

Is it possible to reproject an image in earth engine to non-EPSG defined coordinates? In particular either Goode Homosline (SR-ORG:7619) or Mollweide (ESRI:54009). Passing either to .reproject() ...
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1answer
78 views

Analyze the extent of a NTv2 grid

I am using a NTv2-grid for transformation of geodata. The grid can be found here: gsb-file: https://www.lgl-bw.de/lgl-internet/web/sites/default/de/05_Geoinformation/Galerien/Dokumente/BWTA2017.zip ...
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2answers
139 views

Missing CRS from QGIS 2.18.16

I have installed QGIS 2.18.16 under Linux Mint 18.3. Opening QGIS about, I read that QGIS is compiled against GDAL/OGR 1.11.3, while from Synaptic I read gdal-data as version 2.2.2. The problem ...
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1answer
43 views

ogr2ogr assigns inaccurate srs in

When using ogr2ogr to export from PostGIS to Shapefile a geometry(PolygonZM, 25832) table, the coordinate references system (SRS) is not accurate. ogrsrsinfo returns the correct SRS (below the SRSs ...
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1answer
48 views

How do I get the location from an unidentified coordinate system point?

I'm working in C# and I have this JSON: {"id":429,"name":null,"address":"10 Wooleys La.", "city":"Great Neck", "decadeBlt":0,"totalUnits":12,"propertyType":null, "yea‌​rBlt":0,"expectedCom‌​pletion":...
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3answers
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Extracting EPSG from a raster using gdal bindings in Python [duplicate]

My goal is to check that a shapefile and raster have the same projection and datum using EPSG number. One can easily extract EPSG number from a shapefile by the following: ds=ogr.Open(r'.......
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EPSG:3857 coordinate + (local offset in meters) = new EPSG:3859 coordinate

Given: The EPSG:3857 coordinate of a well known point on an estate A local cartesian coordinate system covering the estate (Unit: Meters, Alignment: North-East) A second point, defined in the local ...
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1answer
437 views

Convert Lat/Lon sexagesimal degrees to UTM coordinates

I'm using proj4.js to convert geographic coordinates (degrees, minutes and seconds) to UTM coordinates (ETRS89 Zone 30). When I get my coordinates result of the transformation I'm checking them with ...
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2answers
68 views

Does transforming postGIS geographic data to EPSG:4326 , makes them geographic?

I am reading this about "Clustering on Indices" and in 25.2 says that The geohash algorithm only works on data in geographic (longitude/latitude) coordinates, so we need to transform the ...
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1answer
235 views

How does ArcGIS Desktop match WMS EPSG codes with ESRI CRS names and parameters and how to add a missing one?

In ArcGIS Desktop 9.3.1, when connecting to a WMS layer, the server sends to ArcGIS the supported CRSs (coordinate reference systems) as a list of EPSG codes. I wonder how ArcGIS (ArcMap and ...
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1answer
321 views

EPSG:31254 to WGS84 Transformation Parameters

The official transformation parameters from EPSG:31254 to WGS84 are: towgs84=577.326,90.129,463.919,5.137,1.474,5.297,2.4232 (EPSG:1618) (defined here and used by ArcGIS MGI_To_WGS_1984_3 ...
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1answer
426 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. ...
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Why is DWITHIN filtering my data with native EPSG 4326 with meters instead of degrees?

Ok so I have a PostgreSQL Table, to which I added a PostGIS geometry column using: SELECT AddGeometryColumn ('public','my_table','geom',4326,'POINT',2); Followed by: UPDATE public.my_table SET geom ...
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1answer
334 views

Using Baltimore City Survey Control System?

A client has provided some surveyed points referenced to the "BALTIMORE CITY SURVEY CONTROL SYSTEM", they're all projected and given in easting/northing numbers. I need to reconcile them with some GPS ...
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1answer
92 views

Setting the_geom to coordinate system EPSG5514 in CARTO?

How can I set my geometry column to coordinate system EPSG5514 Krovak in CARTO? I would like to publish maps on this system. If I enter: UPDATE komunikace_jtsk SET the_geom = ST_Transform (...
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1answer
834 views

PROJ.4 How to create custom CRS to displace by x and y?

I'm trying to create a custom CRS with proj4. I need to displace coordinates by adding 10 meters east and 20 meters north from EPSG:32719. How can I do that with PROJ.4?
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Georeferenced overlay not being displayed properly on Leaflet [closed]

I have an image of Europe and Asia with an unknown projection that I want to display on Leaflet. So I georeferenced it on QGIS with EPSG:3857. The result looks pretty good. For example I get the ...
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1answer
401 views

ERROR 6: EPSG PCS/GCS code 54003 not found in EPSG support files. Is this a valid EPSG coordinate system?

I often get this error message when running pyqgis scripts on QGS project in EPSG:54003 or 54004 (I also noticed also some other SRSs in the past): ERROR 6: EPSG PCS/GCS code 54003 not found in EPSG ...
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0answers
220 views

Reproject XYZ tile layer on the fly in Openlayers 3?

I have an Openlayers 3 application which has a default map projection of EPSG:27700 with both base layers and WFS layers using the same system as well as various mapping tools like measuring options. ...