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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763 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
169 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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122 views

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
44 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
189 views

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
74 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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121 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
366 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
173 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
56 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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63 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
127 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
202 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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101 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
1k 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
112 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
226 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
92 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
84 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
4k views

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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1answer
756 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
93 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
335 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
420 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
834 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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248 views

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
528 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
145 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
2k 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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91 views

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
822 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
332 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. ...
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1answer
397 views

Using WKT (or Proj4) information to define a coordinate system with gdal_translate

The gdal_translate program has an option to define an XML file with the necessary information to download an image using various web map server specifications. I am using this XML option with an ...
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1answer
513 views

Seeking accurate transformation library to convert between EPSG 4326 and 3857 for C#?

I've used Proj.Net library to convert X, Y in EPSG 3857 to latitude and longitude coordinates in WGS84 and vice-versa, but the conversion of latitude is not accurate compared to http://...
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1answer
356 views

Converting 32639 spatial reference to 3857 in PostGIS

I have a polygon layer which is in UTM 39N as x and y coordinates. I need to convert it to EPSG:3857 and for this I used ST_Transform. select st_transform(geom,3857) from block_1 But when I get ...
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350 views

EPSG 4326 to 3857 works on X axis but not Y with PROJ4NET

I am trying to convert a EPSG:4326 Lat Long into a EPSG:3857 reference. I have looked all around and have found slight differences in WKTs but nothing with different values. The following code ...
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0answers
51 views

How are ground control points collected that aren't in WGS84?

I understand that if you collect GCPs using an RTK GPS they are in WGS84 / EPSG:4326 - and you could then convert them to another EPSG. But I'm wondering how GCPs are collected in other coordinate ...
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1answer
338 views

How can I project earth centered cartesian coordinates (EPSG:4978) to lat lon within Geoserver?

I have a PostGIS database with X, Y, and Z ECEF coordinates and I want to create a layer in Geoserver that displays these coordinates as points in OpenLayers. In Geoserver's create layer page there is ...
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2answers
7k views

How can EPSG:3857 be in meters?

It is said that unit of measure for EPSG:3857 is the metre. How it can be, if the range of these coordinates is Projected bounds: -20,026,376.39 -20,048,966.10 20,026,376.39 20,048,966.10 (from the ...
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2answers
629 views

Convert ETRS89_Portugal_TM06 coordinate to Google Map Coordinate

I am trying convert an coordinate (point = {-26841,7714704367;42953,3965652831}) from shapefile with follow prj file: PROJCS["ETRS89_Portugal_TM06",GEOGCS["GCS_ETRS_1989",DATUM["D_ETRS_1989",...
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1answer
434 views

Create a polygon using GDAL to calculate the points

I wish to create a polygon that looks like this (it's a tree and a root scan): I have a file containing positions where readings have been taken, and I have the centre point and the projection. So, ...
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1answer
609 views

Latitude is too close to a pole while converting from EPSG:3857 to EPSG:4326

I am trying to convert EPSG: 3857 to EPSG: 4326 with geotools. Here is my code : public void convertEPSG3857toEPSG4326() throws FactoryException, TransformException { try { ...
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2answers
116 views

Rasterized EPSG 4326

I'm looking for a rasterized world map using the EPSG4326 projection, but haven't been able to find any ones online (or at least decent quality ones that appear that the top left does correspond to -...
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1answer
462 views

howto set ogr2ogr imported SRID to 0? Currently defaulting to SRID 1

I'm currently trying to import a bunch of boundaries into a legacy system with a specific SRID. its a mySQL db. After import and running some intersect code, i receive this error: Binary geometry ...
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1answer
708 views

Are there EPSG codes for solving China GPS shift problem?

I am currently using PyProj for a project, and would like to transform from WGS-84 (or other systems) to the China-specific datums for writing into kml files. I have seen other packages specifically ...
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1answer
450 views

What is this system of coordinates and how to convert to lat lon with R? [closed]

I am not familiar with geographic coordinates systems. Initial data I found these data, and I know that the position is in Paris, but I don't know how to "read" them. 603536, 2429320 Systems of ...
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1answer
164 views

ogr2ogr: define own false easting value?

I have a shapefile with something similar to EPSG Projection 31256 - MGI / Austria GK East. However, the EPSG code states a false easting value of 0, while my prj file contains 750000 (that's probably ...
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2answers
230 views

Transform EPSG 25830 to EPSG 900913

I have a shapefile file of the "cadastre" of Spain, I use the following command in Linux to get the sql file to next insert in database with postgis (shp2pgsql -s 900913 PARCELA.SHP> PARCELA.sql), but ...
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1answer
88 views

What is elevation relative to in EPSG:2284?

I have some locations in EPSG:2284: (3669486.63386,11293013.10592,709.08004), (3669559.13811,11292972.72831,711.60055), (3669639.51308,11292851.48264,712.22258), (3669800.62304,11292949.38118,714....
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1answer
957 views

Adding custom projection to GDAL library?

Can i add my custom projection definition to GDAL library in CentOS? For example, if i want to add custom projection def. in PostGIS i use simple SQL command for inserting projection. But i do not ...