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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19
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1answer
5k 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 ...
19
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3answers
99k 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 ...
148
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4answers
157k views

Difference between WGS84 and EPSG:4326?

What is the difference between WGS84 and EPSG 4326? It seems like for a given dataset it might be both WGS84 and EPSG:4326.
44
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2answers
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What is the difference between EPSG:900913 and EPSG:3857?

I'm using the QGIS google layers plugin to digitize a parcel as a shapefile. Later I want to import it to PostGIS. I know that google maps use a special 'google mercator' projection. What is the ...
22
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3answers
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Do ArcGIS SpatialReference object factory codes correspond with EPSG numbers?

I've got a project where I'm reading in geometry objects from text files to put them in ArcSDE. These geometry objects have an associated EPSG code, and I'm looking for a way to ensure they're in the ...
10
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2answers
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How can I convert geomagnetic coordinates to geographic coordinates without doing the math myself?

I have some data which are in geomagnetic coordinates; that is, they are latitude and longitude, but in reference to the magnetic north pole in Canada rather than the geographic north pole. As you ...
8
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1answer
14k views

Using Fiona to write a new shapefile from scratch

I am new to Fiona, and trying to wrap my head around reading a csv file and writing out an ESRI shapefile. I have most of it down, but am missing two things; (1) defining the projection/spatial ...
45
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2answers
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What's the difference between EPSG:4326 and EPSG:900913?

I am a bit confused on EPSG:4326 and EPSG:900913. I thought that they were both same. Though as I am placing my features over GMaps, which is EPSG:4326, I need to define the srsname of the WFS layer ...
16
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3answers
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How to georeference a web mercator tile correctly using gdal?

As an example I will take the following tile http://a.tile.openstreetmap.org/3/4/2.png and save it as "4_2.png". The WGS84 coordinates of this tile can be calculated or read there by clicking the ...
3
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1answer
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How to access Leaflet EPSG:3857 coordinates?

I read everywhere that Leaflet is internally using a spherical web mercator (EPSG:3857), but whatever I try I get either Lat/Lon (EPSG:4326) or strange coordinates I dont understand: map.getBounds()....
6
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2answers
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Converting EPSG:2284 to EPSG:4326 with pyproj

I have some points in EPSG:2284 and I'm trying to convert them to EPSG:4326 using pyproj, however I get weird results. When I go to the spatial reference website I see that there is an endpoint that ...
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2answers
443 views

GeoTools CRS.getAxisOrder(CRS.getAxisOrder(“EPSG:4326”)) returns EAST_NORTH (LON_LAT)

All is in the title, with GeoTools if I do : AxisOrder order = CRS.getAxisOrder(CRS.getAxisOrder("EPSG:4326")); It returns EAST_NORTH (= LON_LAT), but EPSG:4326 is defined as ordering latitude first ...
44
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3answers
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What is the current Web Mercator projection code?

The web mercator projection, popularised by Google Maps, seems to be given a new EPSG code every couple of years. EPSG:900913 (Google in calculator text) was an unofficial code EPSG:3785 - is the ...
17
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2answers
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Reprojecting WGS 1984 Web Mercator (EPSG:3857) in Python with GDAL

I am reprojecting rasters in python using GDAL. I need to project several tiffs from geographic WGS 84 coordinates to WGS 1984 Web Mercator (Auxiliary Sphere), in order to use them later in Openlayers ...
6
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1answer
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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", ...
5
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1answer
3k 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() ...
4
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0answers
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How to set GDAL/cs2cs/proj to use NTv2 grid shift file when using EPSG codes?

I am using the GDAL API for Python for a script that takes only EPSG codes for inputs to specify source and target coordinate systems. While the cs2cs command seems to handle quite well ...
12
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2answers
871 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:...
4
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1answer
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How to convert gml:pos to latitude and longitude?

I'm trying to figure out the latitude and longitude of rail stations that are contained in this WMS feature list. I'm completely new to the GIS field, so please forgive me if I use the wrong terms ...
4
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0answers
365 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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3answers
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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({ ...
9
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1answer
767 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 ...
3
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1answer
3k views

Converting state plane coordinates to latitude/longitude

I'm trying to convert pairs of x,y coordinates to latitude/longitude using python. The projection is "NAD_1983_HARN_StatePlane_Oregon_North_FIPS_3601_Feet_Intl" and a sample x,y pair is 7625659, ...
10
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2answers
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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 ...
6
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2answers
6k 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 = "...
7
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3answers
9k 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'.......
6
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1answer
1k views

PostGIS spatial reference ID (SRID) for regular cartesian coordinate system?

I would like to store a polygon as a set of 2D points represented as x, y coordinates of a Cartesian coordinate system. Which spatial reference can I use? Looking at my spatial_ref_sys table, all the ...
4
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4answers
5k views

Proper gdaltransform syntax to transform a list of coordinates?

this is probably a very simple question, but I'm very new to GIS so I just need one last nudge. I've got a sense of the Linux utility gdaltransform and I am feeding it coordinate pairs in line-by-...
4
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1answer
277 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 ...
3
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1answer
3k views

Transforming between epsg:3857 and Google Maps Tile coordinates

Hio, I used to use a simple python project (https://github.com/hrldcpr/mercator.py) to convert between wgs84 and google maps tile coordinates. This project doesn't have a license, and looks like it ...
2
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1answer
493 views

Question about BNG coordinate systems

I'm historically a user of MapInfo Professional but have recently started using FME and have been talked into now testing out a copy of QGIS. The main problem I've come across is that the coordinate ...
2
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2answers
3k views

Renderd outputs “failed to initialize projection 4326”

I'm setting up a tile server using the guide provided here. I have everything set up. proj4 is installed in version 4.8.0. The espg file is existant, I ran an xmllint over my xml style file without ...
2
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2answers
17k views

Convert WGS84 coordinate to Google Map coordinate system (EPSG::3785) with GeoTools and Java

Could you please point me out where can I make such a transformation: Convert WGS84 (EPSG::4326) coordinate to Google Map coordinate system (EPSG::3785), and vice versa.
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2answers
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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 (...
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1answer
210 views

Projection system differs

I want to define projection for a Shape file. The projection system is: "NAD_1983_StatePlane_Montana_FIPS_2500" which is referred in Qgis 1.9 as EPSG:102700. The same projection system is not ...
5
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1answer
85 views

Where do I find CRS axis names?

When using the SUBSETTINGCRS argument of a WCS query, one needs to provide the axis labels in the subsetting CRS. This answer to GeoServer does not work WCS parameters "subsettingcrs" and &...
3
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1answer
2k views

Local Ortho projection to Proj4

We are trying to use proj4 to project a local coordinate system to EPSG4326. We believe we have most of the string created correctly in QGIS and as follows; +proj=ortho +datum=WGS84 +lat_0=40....
3
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3answers
511 views

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 ...
3
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1answer
2k 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 ...
3
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2answers
139 views

Convert image from one EPSG defined CRS to another

I've got a lot of image files (.png or .jpg) that I want to convert from one EPSG defined CRS system to another, e.g. from EPSG:31255 to EPSG:25833, on a server within a Java app. For each image I ...
2
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1answer
410 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....
2
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1answer
637 views

What's the difference between EPSG: 3043 and EPSG: 25831?

When I open a layer projected in ArcGIS with EPSG:25831, QGIS detect it as EPSG:3043. Apparently everything is where it is supposed to be, and checking both EPSG:25831 and EPSG:3043 they appear to ...
2
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1answer
960 views

OpenLayers and OSGB 1936 (CRS 27700)

I've been working with loads of shapefiles projected according to OSGB 1936 (CRS 27700). The project CRS is set to EPSG:27700 and "On the fly reprojection" to EPSG:27700 is set (I keep this as a ...
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2answers
1k views

Projected layer misaligned with Mapserver

I have a couple or raster files in epsg:23031 reference that i want to reproject to other reference systems (epsg:4326 and google projection) using the 'on the fly reprojection' of Mapserver. No ...
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2answers
63 views

How to manage different SRID data in same database table? [closed]

My data is in two different cities and three different EPSG code area. (Database is PostgreSQL/PostGIS.) So I think, I can not set SRID values by data. Making 3 different table is difficult. How can ...
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0answers
483 views

Show a kml (which uses longitude and latitude EPSG:4326) in “google/OSM” projection (EPSG:3857) in open street map

I am showing a kml layer, over OSM. The points in the kml are latitude/longitude (EPSG:4326). I don't have to convert any points or anything, it all just works. Great! Now, the client also wants to ...
1
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1answer
578 views

Using proj to convert EPSG:2263 to WGS84

I have input data in EPSG:2263 with X and Y coordinates such as: X,Y 987043,206407 982441,212359 990907,209020 (these locations are within NYC). I need to convert these to WGS84. Using QGIS if I ...
1
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1answer
206 views

Get relative north aligned point 2163 (US Equal Area)

What I'm trying to do is create a grid where the y axis is north aligned. I have a origin Lat/Lon point which is the bottom left corner of the grid and each cell should be 100 by 100 meters. So I ...
1
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1answer
768 views

GDAL does not recognize EPSG code of a shapefilefile reprojected by ogr2ogr

I am using ogr2ogr to reproject shapefiles. For example: ogr2ogr -s_srs EPSG:1234 -t_srs EPSG:3857 dest.shp srs.shp ogr2ogr then creates dest.shp, dest.shx, dest.dbf and dest.prj as expected. The ...
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2answers
429 views

why is there a difference between using EPSG and using basic code

I have the OSgeo4w installed on my PC and I am trying to upload ITM(israel transverse mercator) landmarks to google earth. To do this I am using the cs2cs command.I noticed that i get a deviation ...