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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44 views

Getting Projection Code (EPSG) from Coordinates and known location

I have Coordinates (x=3381438.573, y=5794542.432) and a location (somewhere south of Berlin). Is there a way to find out the Projection code this data was defined with? A website would be nice.
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1answer
540 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 ...
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0answers
42 views

Map in QGIS is displayed tilted? [closed]

CRS is wgs 84 epsg:4326 Still the map and the data on screen is showing tilted.
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1answer
4k views

Using customized Coordinate System in ArcGIS Desktop?

I don't know so much about coordinate systems... In my office we use to deal with spatial data coming from archaeological sites. Each site has its own x-y-z coordinate system (GCS). Three simple ...
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2answers
120 views

Get a list of all supported EPSG code from OGR

I need get a a list of all supported EPSG code from OGR/GDAL. I need this becaouse i'm developing a C++ application map, and I need this information to put it in a user form. I read the OGR ...
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1answer
85 views

Getting EPSG code in pyproj with version==2.1.3?

I'm using pyproj in python and I want to get epsg code based on an existing Proj class. An example in version=1.9.6: from pyproj import Proj CGCS2000metre = Proj(init='EPSG:4544') print(CGCS2000metre....
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2answers
1k views

Adding custom projection to epsg.properties?

I have created an entry at www.spatialreference.org of a customized .prj file. http://www.spatialreference.org/ref/sr-org/7973/ I'm trying to add the generated geoserver entry to the EPSG.Properties ...
2
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2answers
83 views

pyproj EPSG:4326 converts degrees to radians

Case My input is a point given as x, y and an SRS name which specifies how to interpret the numbers. My goal is to convert these into lon, lat in degrees. I convert this by using this piece of code:...
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28 views

OpenLayers: find out the units of height value

Is it possible in OpenLayers to find out (ideally from ol/proj/Projection or from ol/source/Source), what is the Unit of Measurement for height (z-coordinate)? Or is it possible to assure somehow, ...
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2answers
77 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 ...
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2answers
4k views

math formula for transforming from EPSG:4326 to EPSG:3857

is there any math formula for transforming from EPSG:4326 to EPSG:3857 ? i want to implement it in php code
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1answer
39 views

Import the EPSG:7775 projection without PROJ.4 to QGIS?

I wanted to define the EPSG:7775 projection in QGIS but it has no field for PROJ.4. Everywhere I've seen that you can import a projection with PROJ.4. How do I import this? I am trying to do this (...
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1answer
45 views

Create Memory layer in pyQGIS with projected coordinates

I am trying to make a memory layer in QGIS using python and then generate a grid base on calculations in meters. When I run the script, a banner comes and says the CRS is not defined. Then when I look ...
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0answers
14 views

NDFD Grib2 geotransform

I am trying to transform the projection for my data in grib2 format to long/lat, but I'm not sure I'm using the correct EPSG. The data says it uses a "Lambert_Conformal" projection with a WGS84 ...
2
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0answers
289 views

Change Axis Order when transferring data from WFS to PostGIS DB

I am using GeoKettle to transfer data from a WFS service to a PostGIS database. The projection of the geometries is EPSG:4326 : GEOGCS["WGS 84", DATUM["World Geodetic System 1984", SPHEROID[...
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0answers
69 views

EPSG:4326 being saved as CRS:84

I am trying to save a GeoJSON file in QGIS as EPSG:4326, but it keeps being saved as CRS84. EPSG:4326 and CRS84 are the same except CRS84 saves coordinates as long, lat - and EPSG:4326 saves them as ...
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Why does QGIS save EPSG:4326 as long, lat? [duplicate]

Why does QGIS save EPSG:4326 with coordinates in the longitude, latitude format? Isn't the correct standardized format latitude, longitude?
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2answers
402 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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2answers
4k views

How to transform EPSG:3857 to tile pixel coordinates at zoom factor 0?

I'm creating a Leaflet map with an WebGL overlay (using L.CanvasOverlay) which renders a street network on the GPU. Let's assume I have a point (1497143.62, 6896952.18) in EPSG:3857 and want to ...
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3answers
43k views

Change OpenLayers 3 view center

I'm using OpenLayers 3 to interact with some maps. I first declare my map: map = new ol.Map({ target: 'map', layers: [ new ol.layer.Tile({ ...
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1answer
506 views

MySQL and the ST_IsValid function returns error

I am running MySQL // Percona 5.7 and I added a Polygon to my table: DROP TABLE IF EXISTS `test_table`; CREATE TABLE `test_table` (`uid` int(11) unsigned NOT NULL AUTO_INCREMENT,`geom` geometry NOT ...
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1answer
202 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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0answers
21 views

CityGML EPSG::4326 but data unit not degree?

I'm very new to GIS. I'm trying to understand 3D city maps in the format of CityGML, as well as extract and identify individual buildings. Currently my coordinate system (SRID) is set as 4326, which ...
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1answer
34 views

Layer renders twice with EPSG:5514 in WMTS OpenLayers

I am trying to create a WMTS layer in OpenLayers with the following properties: Url: http://geoportal.cuzk.cz/WMTS_ORTOFOTO/WMTService.aspx Matrix set: jtsk:epsg:5514 Projection: EPSG:5514 I am ...
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2answers
109 views

Check if custom CRS already exists, find EPSG

I created a "custom" CRS with specifications I got from someone who needs the data in that specific system. I worked well and I now have a *.prj file, so basically a WKT-representation of that CRS. ...
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1answer
57 views

Convert EPSG:2263 LiDAR data to EPSG:4326 to use with FSX

I have LiDAR (las) input files in EPSG:2263 (NAD83, NY state plane, feet_US) aquired from https://gis.ny.gov/elevation/ and want to convert those file to EPSG:4326 (WGS84) for use in MS Flight ...
14
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1answer
482 views

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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0answers
28 views

Are Azimuthal Equidistant and ESRI:54032 the same thing?

I am looking at (A): https://proj4.org/operations/projections/aeqd.html#cmdoption-arg-ellps and (B): http://epsg.io/54032 Description: +proj=aeqd +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 +ellps=WGS84 +...
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0answers
53 views

Aligning Vector Data with Basemap in QGIS?

I have been having difficulty aligning my vector data (Suitable Polar Bear Den Habitat...) and the streams on the basemap. The vector data is offset slightly eastward. My hypothesis is this is a ...
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0answers
36 views

Defining coordinate system for finding distance in meters [duplicate]

What should I do to find the distance between two very far points? p1 = "POINT(6.2 61.1)" p2 = "POINT(6.1 61.0)" select ST_Distance( ST_Transform(ST_GeomFromWKT('$p1'), 'EPSG:4326', '$epsg'), ...
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1answer
75 views

Get proj4 parameters from EPSG in C++

I have the EPSG number of the projection and I want to use proj4 to get the projection descriptive string (like +proj=lcc +lat_1=49 +lat_2=44 +lat_0=46.5 +lon_0=3 +x_0=700000 +y_0=6600000 +ellps=GRS80 ...
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0answers
20 views

Name of a custom Goode homolosine projection

What is the specific name of this homolosine projection? I see that America is closer to Europe/Africa than in the typical homolosine.
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1answer
66 views

Can ArcMap open shapefiles made by QGIS?

I have created many EPSG shapefiles in QGIS and would like to import them into ArcMap for analyzing. Can ArcMap open shapefiles made using QGIS?
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1answer
40 views

How can I determine the original spatial reference system of GML coordinates when I have their WGS84 equivalent but no EPSG?

I am querying out spatial information from a SQL database that stores locations that users input on a map as GML snippets. See below for an example: <gml:Point xmlns:gml="http://www.opengis.net/...
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1answer
26 views

GeoTools CRS.findTransform suddenly failing

I have a body of users using an Eclipse RCP-based Java desktop app (32-bit JRE1.7, Windows 7) that uses GeoTools for world/screen projection handling. This morning the app has started failing for ...
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2answers
75 views

Converting between coordinate systems but retain visual shape? [closed]

We have some data that is stored in GeoJSON format (using EPSG:4326), but now we want to display the data in the mapbox-gl-js, which only supports EPSG:3857 for display (support for other projections ...
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0answers
75 views

Understanding proj4, epsg and esri *.prj in depth? [closed]

Where can I find a good resource that teaches me 1) about the difference between proj4, EPSG and ESRI *.prj? (Why do several coordinate system definitions exist? When should I use which? How are they ...
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1answer
30 views

GeoTools MapFrame statusbar set reference system list empty

I'm using geotools.version = 20.0. After debugging the set reference system functionality, the following is executed but the codes list is empty: CRSAuthorityFactory fac =ReferencingFactoryFinder....
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145 views

Create a valid shapefile with phpmyadmin/Shapefile lib

I'm trying to create a shapefile with the PhpMyAdmin\ShapeFile library. I followed the example in the Github project repository, but I would like to create a shapefile within polygon elements, not ...
2
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0answers
48 views

osm2pgsql import OSM data in EPSG:27700

I am trying to use osm2pgsql on Windows to import OSM data to a PostGIS database. I want to pass the EPSG:27700 via the --proj option as follows: osm2pgsql --proj 27700 <other options not shown>...
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0answers
22 views

WFS how to consume with different coordinate system? [duplicate]

I have a WFS in EPSG:4167. My map view has EPSG:3857. How to make the WFS work on a map view with different coordinates? I used this to define my coordinate system from wfs: import { register } ...
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1answer
1k views

Missing EPSG Factory

When I using jar and osm file the terminal show: 10:39:29.940 INFO (OpenStreetMapModule.java:171) Building street graph from OSM Feb 14, 2017 10:39:30 AM org.geotools.referencing.factory.epsg....
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334 views

Convert coordinates with Proj4Leaflet from EPSG:25832 to leaflet 3857

I have a wmts server, and try to add this tiles to leaflet with proj4leaflet. My code is here //this one is fine var main = L.tileLayer( 'http://****&zoom={z}&x={x}&y={y}',...
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1answer
73 views

Formulation of CRS (EPSG2438 to EPSG4326) conversion in Excel

I have about 14000 points with coordinates EPSG2438 and want to convert the coordinates into WGS84 (EPSG4326). I want to know that is there a way to make Excel formula to convert these coordinates. In ...
2
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1answer
132 views

QGIS EPSG value differs from ArcGIS and spatialreference.org

Background: I have both QGIS 3.4.1 and ArcGIS Desktop 10.6.1 installed on the same laptop, Windows 10. I have a polygon shapefile that is projected to Lambert Conformal Conic. Arc states that the ...
15
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3answers
78k views

Changing projection of shapefile in QGIS?

How do I change the projection of my shapefile using QGIS? The default projection is set to EPSG:3003, I want to change it to wgs84 EPSG:32632. When I do a reprojection or I change projection in the ...
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0answers
30 views

Command line to change altimetric reference with gdal

I want to convert a DEM with the following GEOGCS : GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223563, AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], ...
2
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0answers
201 views

From ESRI:103300 to EPSG:4326 in SQL Server

This question is more or less a sequel to Performance of joining tables on a geometry column with SQL Server As explained in the above link, I have a shapefile that I upload to my SQL Server DB using ...
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3answers
386 views

Which coordinate system is the best for a distances from whole USA?

I have about 100 cities all over the USA and want to calculate some distances. According to that I want use one coordinate projection and need to know which one is the best so I can get the most ...
4
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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() ...