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

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16 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 ...
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2answers
26 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, ...
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0answers
17 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 ...
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2answers
33 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?
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1answer
47 views

Description CRS EPSG:6372

does someone know where could I find a description of CRS EPSG:6372. I searched in the EPSG page but seem not to find something that quick..
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1answer
405 views

How to convert distance in meters(EPSG:28406) to EPSG:900913 with OpenLayers?

For point I use OpenLayers and transform(): numZona = Math.ceil(parseFloat(lon)/6)); Proj4js.defs["EPSG:28406"] = '+proj=tmerc +lat_0=0 +lon_0='(parseInt(numZona)*6-3)+' +k=1.000000 +x_0='+numZona+'...
3
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1answer
41 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 ...
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1answer
31 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....
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1answer
271 views

GeoTools, convert CRS for Google Maps

I'm trying to use GeoTools to convert coordinates from EPSG:3857 to various CRS, in order to display WMS layers on a Google Map. For example, I want to display a layer in the EPSG:4326 CRS. I have ...
2
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1answer
416 views

how to transform DB stored EPSG data to Geography data type in sql server

I have a 3 GB database in SQL Server, with certain points stored in float values. The points are stored in EPSG 3765. I would prefer to have them saved in the Geography datatype. I can not store them ...
0
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1answer
21 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 ...
3
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1answer
31 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 ...
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0answers
12 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 ...
1
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1answer
97 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 ...
6
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1answer
126 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 ...
2
votes
1answer
30 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 ...
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2answers
1k views

PROJ4 Library error in combination with MapServer 6 and CentOS 6

I have recently compiled MapServer 6.2 on a CentOS 6.3 machine. Since I compiled it --with-proj=/usr, all the PROJ4 related stuff resides in /usr/share/proj. I've also installed proj4 with yum ...
2
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1answer
289 views

Geoserver projection recognize problem

I'm publishing shape files in geoserver through curl,my problem is that geoserver didn't recognizing the projection which is in ESRI WKT format(layer was publishing).I searched for this problem i ...
1
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1answer
54 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 ...
10
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1answer
1k views

Using customized Coordinate System for Archaeological site data

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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0answers
51 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 ...
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0answers
56 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 ...
2
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1answer
53 views

Geowebcache alias for custom projections

Is there a way to configure a projection alias in geowebcache? E.g. if I would like to advertise projection EPSG:25833 and EPSG:32633 to the client, while requesting tiles from the backend using ...
2
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0answers
57 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 ...
0
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1answer
43 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 ...
3
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2answers
63 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: "+...
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2answers
190 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 = "...
4
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0answers
65 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-...
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0answers
36 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 ...
3
votes
3answers
1k 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-...
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0answers
254 views

OpenLayers WMS to Leaflet with EPSG:2170 projection

This is the original code for OpenLayers 2 var res = [ 1000.0 / 4.0, 1000.0 / 8.0, 1000.0 / 16.0, 1000.0 / 32.0, 1000.0 / 64.0, ...
1
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1answer
248 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 ...
0
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0answers
95 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....
12
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2answers
2k views

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 ...
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0answers
95 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 ...
2
votes
1answer
541 views

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()....
1
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1answer
1k 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 ...
3
votes
2answers
669 views

How do I convert EPSG:26986 coordinate pairs to EPSG:4326 from the MassGIS web service, the Linux command-line, or PHP?

I'm a GIS newbie, normally a PHP web applications developer. I am trying to map all boundaries of the MA state representative districts. So I just need to convert polygon coordinates from the ...
0
votes
1answer
48 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
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1answer
494 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 ...
0
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1answer
267 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<...
1
vote
1answer
973 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 ...
7
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2answers
230 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
140 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
34 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
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1answer
83 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
2answers
89 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 ...
2
votes
1answer
163 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
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1answer
152 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....
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0answers
102 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 ...