The process of converting the coordinates of a map or an image from one system to another, typically by shifting, rotating, scaling, skewing, or projecting them.
3
votes
1answer
336 views
How to detect MGRS/UTM zone?
I posted a similar question on StackOverflow, but I thought I'd check here as well.
I am developing an open-source library for converting between coordinate systems, and I've run into a wall.
I want ...
0
votes
1answer
66 views
“Request contains a format not offered by the server.” Error when using CRS transformation with WMS in QGIS
When I try to load a WMS layer which has a WSG84 as a default projection and use a CRS transformation on it, it gives this error message:
Request contains a format not offered by the server.
The WMS ...
4
votes
0answers
69 views
How much error in a transformation?
I've been working in GIS for about a year and have a functional grasp of Projections and Transformations from within ArcGIS (10.0). Geosoft Oasis is another program we use. In working with our data ...
2
votes
0answers
286 views
Projecting point in Leaflet from EPSG 900913 (same as 3857) to EPSG 2232 with proj4js returning unexpected results
I have a leaflet map from which I want to be able to query an api that accepts x y values in EPSG 2232 as inputs. Leaflet doesn't handle point transformations like Open Layers does so I am trying to ...
2
votes
0answers
89 views
projection discrepancy with gdal (1.9) and proj4
I boiled the problem down to that python example:
import sys
try:
from osgeo import gdal
from osgeo import osr
except:
import gdal
import osr
if __name__ == '__main__':
version_num = ...
2
votes
0answers
144 views
How to decode Magellan URL coordinates to lat/lon
Magellan uses this URL to designate a coordinate in New York:
mgn:///address/?coord=merwFvlqbM,name=Viva%20Herbals%20Pizzeria,number=179,street=2nd%20Avenue,city=New%20York,country=US
How can I ...
2
votes
0answers
347 views
Use MS SQL Server to convert MGRS to Lat Long
Below is the SQL for converting Military Grid Reference System (MGRS) to decimal Latitude and Longitude. It is very accurate, but not perfect. If you can make it work 100%, it is yours, but PLEASE ...
1
vote
0answers
34 views
Applying proper correction from True to Grid
I have a very basic question that will seem very elementary to most who observe this website. The reason I ask is because I have been told to difference answers and I'm now a little confused. So, here ...
1
vote
0answers
40 views
Geokettle transformation for FileGDB to SHP
I want to transform FileGDB layer to Shapefile on Geokettle. Firstly i added OGR Input and than i added a Shapefile Output. And i entered parameters shown on the screenshot but i got errors for ...
1
vote
0answers
26 views
How to identify grid shift file used by osgeo in Python?
I wrote a Python script reprojecting points from a source coordinate reference system (SCRS) to a target one (TCRS) both identified by an EPSG code.
I would like my python script to retrieve details ...
1
vote
0answers
61 views
Using the CropCoverage Render Transformation in a Geoserver SLD (WPS)
I've yet to find an example on the web (or in code) of anyone using the "Crop Coverage" Render Transformation from a Geoserver SLD. Does anyone have an example or at least be able to point me to the ...
1
vote
0answers
92 views
ArcPy 10.1 PointGeometry.projectAs()
I'm trying to reproject an X,Y passed in from an Add-in.
So far this works fine:
pointGeometry = arcpy.PointGeometry(arcpy.Point(x,y),srIn,False, False)
projectedPoint = ...
1
vote
0answers
139 views
On the usage of Proj4Js->tmerc.js
I am using "proj4js & open layers" for my mapping.
I got projection & datum (which is based on "Transverse Mercator") of a local plane and
this plane is part of a grid which returns ...
1
vote
0answers
304 views
How to transform Lambert to WGS84 in SQL Server?
Need to create a SQL view of calculated Lat/Lon values from an existing SQL view of County Coords.
Loaded up SQL Server Spatial Tools and registerd CLR types. Lambert generated a resource error.
-- ...
1
vote
0answers
135 views
Can I overlay layers in Dealul Piscului 1970 and WGS84 in QGIS?
I have a 10 Gb ECW file (mosaic of a whole county) that is in Oblique Stereographic projection with Datum: Dealul Piscului 1970. The problem was that no matter the Default CRS for new project was, ...
0
votes
0answers
14 views
geotools / jts crs transformation result not at correct position
I copied the example from geotools, which shows how to transform a shapefile into a different projection. (http://docs.geotools.org/latest/userguide/tutorial/geometry/geometrycrs.html)
But when ...
0
votes
0answers
23 views
How to snap Vector Layer projection to Raster layer projection in QGIS?
I have raster in correct projection. I used ShapeFiles, and marked objects(manually), but i found out that my vector layers have different projection, so they have different size and position. Is ...
0
votes
0answers
54 views
OpenLayers - Transform resolution
I want display resolution of the map for each zoom level. So I've create event listener for zoom event, but it is displayed in different projection that I want (I guess). So I need to transform this ...
0
votes
0answers
31 views
Can QGIS transform a set of XY coordinates to a new set reconciled to UTM coordinates?
I have a large data set of coordinates (in meters) measured on the ground relative to a set of trails in Peru. These were generated in the 1990s with a tape measure, and there are about 3000 of them. ...
0
votes
0answers
74 views
coordinate transform from one srid to another in nettopology suite, c#
In a program using c#, .Net, I read a geometry field from a spatialite database into a variable of type GeoAPI.Geometries.IGeometry, in SRID 4326 (WGS 84). I want to transform this, in code, to a ...
0
votes
0answers
153 views
How use thin plate spline transformer to wrap image in c#
I'm new at programing with GDAL C#.
I need to geotransform raster image (using GCP's) and bring it to the Merkator projection. With FWTools I can do this by using gdalwarp -r cubic -tps after ...
0
votes
0answers
57 views
What's the difference between CRS 4326 , CRS 4978 and CRS 4979?
They are all based on WGS84. 4326 is called "geographic 2D", 4978 is called "geocentric", 4979 is called "geographic 3D".
What are the differences between these three?
Why are we using "geographic ...
0
votes
0answers
94 views
How to make pyproj work in py2exe package?
I have a python script where I use pyproj as follows:
..
from pyproj import Proj
from pyproj import transform
..
def transformation(extent):
wgs = Proj('''+proj=longlat +ellps=WGS84 +datum=WGS84 ...
