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.
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91 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 ...
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votes
0answers
100 views
Project custom metric coordinates on the EPSG map with GeoServer [closed]
I have an application that displays different items on the custom map. The map has a coordinate system which is basically (X,Y) coordinates in centimeters where top-left corner has coordinates(0,0). ...
2
votes
0answers
140 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 ...
7
votes
1answer
540 views
Computational most efficient way to convert Cartesian to Geodetic Coordinates
As far as I understand the literature there are several ways to convert a set of geoecentric cartesian coordinates to geodetic coordinates
Bowring, 1976
Borkowski, 1989
Lin & Wang, 1995
Toms, ...
2
votes
2answers
233 views
How to transform Lambert coordinates in C#?
I want to transform Lambert (EPSG:3035) coordinates to EPSG:4326 in C#.
I have tried this:
var lambert = cf.CreateFromWkt("PROJCS[\"ETRS89 / ETRS-LAEA\",GEOGCS[\"ETRS89
...
2
votes
1answer
596 views
How to use OpenLayer.Transform?
I want to draw a rectangle. The coordinates are somewhere in northern Germany. But the rectangle shows up in the Near East? What am I doing wrong?
var epsg900913 = new ...
0
votes
1answer
160 views
coordinate projection
I'v got a detail map for an event as PDF an made an openlayers slippy map with Maptiler. I now need to place markers at the position of gps/gsm-trackers, which store their coordinate on a server.
The ...
3
votes
1answer
321 views
Transform multiple layers as one unit in ArcGIS 10?
The general/conceptual question:
Is there a way to transform multiple layers together in ArcMap 10 (on Windows XP SP3) as one unit?
More specifically:
I have an ArcMap document with a georeferenced ...
0
votes
1answer
318 views
Reprojecting non 4326 WMS image to spherical mercator
In OpenLayers, I'm trying to display a WMS overlay (EPSG:4269) from a server I don't have control over to a spherical mercator projection.
Is there an equivalent to this:
...
3
votes
2answers
368 views
Error transforming EPSG:4326 to EPSG:90013
When I'm trying to run a map on geomajas an error has occurred:
o.g.internal.service.GeoServiceImpl - Problem during transformation
EPSG:4326->EPSG:900913 of MULTIPOLYGON
The multipolygon ...
3
votes
1answer
338 views
PostGIS 2.0 ST_Transform with Rasters cannot find custom SRID
I'm trying to calculate an average value in a buffer around a point.
Given a raster in EPSG 4326 and a similar point, this is fine, except that the values will be skewed as they are not projected in ...
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vote
1answer
249 views
How to transform ETRS to EPSG?
I have data in the ETRS 89 LAEA format (SRID: 3035). But I have problems to transform it.
Example data:
N2736 E4541
I want to transform it to EPSG WGS84 (SRID: 4326), to check the coordinates on ...
3
votes
1answer
176 views
How does latitude of origin work in Mercator
I'm trying to make a coordinate transformation using GDAL/osr python bindings. I have a longitude an a latitude and I want to transform them into the mercator coordinates.
So I define the mercator ...
1
vote
0answers
136 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 ...
0
votes
2answers
133 views
How do you pass parameters for Proj4js implementation with OpenLayers
I am using Proj4js along with OpenLayers for the transformation of x,y (projection type is Transverse Mercator) to long, lat.
While executing "inverse()" method what I noticed that in tmerc.js some ...
0
votes
1answer
86 views
How to adjust/convert/transform set of points with unknown crs using reference points
I have a set of points in an unknown crs.
How can I convert (not guess) this to a given crs?
I know, or rather I can determine the actual coordinates of each point in order to have some reference ...
2
votes
0answers
336 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 ...
4
votes
1answer
274 views
EPSG operations and operation methods
Querying through the EPSG database, I can see the tables epsg_coordoperation where transforms and conversions between different CRS are stored, and epsg_coordoperationmethod which stores the ...
3
votes
1answer
89 views
How can i get a transformation-parameters-report (spatial-adjustment)
everyone!
In ArcGIS resource center about spatial adjustment (How Transform works), there are transform report like this !
Scale (X,Y) = (249.927,249.927)
Rotation (degrees) = (0.362) Translation = ...
1
vote
1answer
525 views
How to perform transformations using ProjNet?
While writing some unit tests I thought it would be convenient/possible to use ProjNet to convert from EPSG:4326 into several other coordinate systems (3875,3395). I figured it would be as easy as ...
3
votes
1answer
836 views
How to transform shp file into raster file in Quantum GIS?
I'd like to transform a shape file into raster file in Quantum GIS... and the opposite way back also (raster to shp). Can you help me?
5
votes
2answers
369 views
Translating all features in a shape file
I have a friend with a bit of a problem. He has 1000+ shape files mapping paddocks and being used for precision agriculture. He's recently discovered the base station positions used to create these ...
0
votes
2answers
267 views
Setting spatial reference for MapInfo tab-file
How can I change spatial reference for tab-file in MapInfo Professional?
5
votes
2answers
2k views
Rotating a vector layer in QGIS with qgsAffine (or other method)?
I would like to rotate a set of vector points in QGIS an arbitrary number of degrees around a central point (or arbitrary point).
This is similar to a recent question about creating a regular grid; ...
0
votes
1answer
1k views
Adding EPSG:3857 / 900913 to Oracle's mdsys.cs_srs
I am working with an Oracle Standard database at version 11.2.0.1.0. I also have access to XE version 11.2.0.2.0.
The later version has both SRIDs 900913 (Google Mercator) and 3857 (official Web ...
4
votes
1answer
1k views
Characteristics of different methods to convert ECEF to LLA
I'm trying to convert ECEF (Earth Centered, Earth Fixed) coordinates, which are defined in X,Y,Z, centered at (0,0,0) to LLA (Latitude, Longitude, Altitude). There are a couple of methods I found on ...
5
votes
1answer
870 views
Mercator projection: problem with latitude formula
I'm trying to get the position of a coordinate on this map (source Wikipedia):
If I'm correct than the formula for the position of the latitude would be:
R * ln(tan(pi/4 + latitude / 2))
But ...
4
votes
1answer
1k views
Transforming geometry coordinates from SRID 4326 to SRID 3011
In SQLServer geometry field, I want to change the coordinates of geometry from one spatial reference system to another spatial reference system (from SRID 4326 to SRID 3011) by using ST_Transform. But ...
2
votes
1answer
1k views
Projecting shapefile with transformation using OGR in python
I want to change coordinate system of a shapefile from British National Grid to WGS84 (in order to be able to convert it to KML later on). To get the best results of projecting I would like to use ...
3
votes
1answer
252 views
How do I perform one-step transformation in python?
I would like to perform transformation for this example data set.
I have here four pairs of adjustment points and want to transform given point coordinates from primary system to secondary system ...
3
votes
2answers
691 views
How to reproject from Michigan Georef to WGS84 in QGIS?
I am trying to reproject a michigan state land shapefile which is the NAD83/ Michigan Oblique Mercator EPSG:3078 to the WPG84 EPSG:4326 projection. However when i try to do this my map gets squished ...
2
votes
2answers
557 views
How to convert from GeoTIFF to PNG/JPG and Web Mercator in Java?
I'd like to convert raster image from (geo)tiff to an png/jpg and afterwards if it is necessary ... I'd like to convert the coordinates with help of EPSG-Codes to the OSM/Google Projection(EPSG: ...
2
votes
3answers
633 views
How can I transform some KML data to Sql Server 2008 using FME?
I've just downloaded FME 14 day trial. I'm trying to see how easy/hard it is to transform some KML data (a simple neighbourhood shape) into my Sql Server 2008 database using FME.
I sorta don't even ...
2
votes
2answers
165 views
How to perform multiple string transformations using one transformer in FME Workbench?
I am converting a .DWG file to .GDB. All fields in DWG file are of Char type. The target .GDB needs to have some attributes in Float data type. For now, I am using one StringFormatter transformer for ...
1
vote
0answers
295 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
133 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, ...
1
vote
1answer
169 views
Dynamic defining of transformation type for ISpatialReferenceFactory.CreateGeoTransformation call
Suppose given a point (IPoint) in some coordinate system. Required to transform it to another coordinate system. If both of coordinate systems are predefined, we can use IGeometry2.ProjectEx with ...
2
votes
3answers
115 views
What Danish position format is this?
I have been given a list of locations within Denmark. Most of the are in decimal degrees. However, some of the positions are in different formats and I can't figure them out. Does anyone recognize ...
3
votes
1answer
111 views
Debugging FMW memory usage near Group-based Transformers
I have a large FME FMW file which is using a lot of memory at runtime. I have been tasked with trying to find ways to reduce the memory footprint.
Early on in the workbench there is (what I assume ...
2
votes
1answer
562 views
ArcObjects: How to create a composite Geotransformation and use with the GeoProcessor
Using arcobjects, I am trying to programmatically create a composite geotransformation and then use to project features with the geoprocessor. Found old VB6 code out there on the web, but I can't ...
1
vote
1answer
252 views
Issues with defining projection to that of the current root file
I am creating a shp file with the extent of all the raster file in a set of directories and it works fine when all the rasters are in the same projection but not when they switch around.
So I want to ...
1
vote
2answers
1k views
How can I get the values returned by an OpenLayers bounds object in Longitude / Latitude format?
I've created a map and added a layer using the Open Layers library:
map = new OpenLayers.Map('map');
var gphy = new OpenLayers.Layer.Google("Google Physical", {type: G_PHYSICAL_MAP});
...
1
vote
2answers
808 views
How to convert data in NAD83 (NSRS 2007) to NAD83 (CORS 96)?
I'm quite a ways outside my box on this one, but I would ceratinly appreciate any perspectives on this issue. I have some control points from NGS that are in NAD83 (NSRS 2007) that I would like to ...
1
vote
2answers
2k views
Getting a Bounding Box in Latitude / Longitude using PostGIS shp2pgsql
Using the PostGIS shp2pgsql -s 4326 ... I generated the sql file and created my spatially enabled table.
When executing my query:
select box2d(ST_extent(the_geom)) from feature_data;
I'm returned ...
9
votes
4answers
626 views
How to reproject spatial data using free libraries?
How can I use free libraries to transform spatial data?
For example,
I want to change the projection of a Shapefile within the code of my C# web application. How do I do that?
10
votes
4answers
2k views
How to move vectors to specified coordinates in QGIS?
I have a layer of vectors located around, say, (100, 100), and I want to move them to new coordinate like (1000, 1000). How should I do it? Preferably using QGIS.
4
votes
4answers
3k views
How to reproject base layers in OpenLayers?
The issue is:
I have vector/topo/image tiled maps for some places in north america which were published as ArcGIS Server REST service. These maps (A) are based in EPSG26912 projection. Now I wanna ...
2
votes
1answer
395 views
Postgis: WGS84 Lat Lon Point to Gauss-Kruger 3
How do I convert a WGS84 lat lon point in postgis to Guass Kruger 3 (31467)?
Somehow, I do not seem to get it right. I tried the usual way for converting projections:
...
2
votes
1answer
604 views
How to provide transform information to openlayers on Image layer
I would like to include an overlay raster layer into my OpenLayers map. I've pre-transformed the image into the correct projection (EPSG:900913) and saved as a png using the gdal_translate command:
...
4
votes
1answer
199 views
Access is Denied error on ProjectEx call
I need to be able to convert a lat/long coordinate into a point coordinate and am having trouble getting my code to work. I created a test app isloating the code that is giving me problems. I'm ...
