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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521 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 ...
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1answer
167 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 = ...
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2answers
3k 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 ...
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2answers
661 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 ...
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2answers
1k views

Setting spatial reference for MapInfo tab-file

How can I change spatial reference for tab-file in MapInfo Professional?
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1answer
4k 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 ...
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1answer
7k 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 ...
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1answer
3k 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 ...
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1answer
6k 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 ...
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1answer
3k 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 ...
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1answer
578 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 ...
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2answers
1k 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 ...
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2answers
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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: ...
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4answers
3k 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 ...
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2answers
389 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 ...
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0answers
548 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. -- ...
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1answer
6k views

Transforming EPSG:3857 to EPSG:4326

I am new to gdal and have a simple question. I want to transform an image from OpenStreetMap projection to Nasa Blue Marble projection. What I understand is that OpenStreetMap projection is EPSG:3857 ...
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0answers
176 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, ...
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1answer
294 views

Dynamic defining of transformation type for ISpatialReferenceFactory.CreateGeoTransformation call [duplicate]

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 ...
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3answers
141 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
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1answer
164 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 ...
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1answer
1k 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 ...
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1answer
487 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 ...
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2answers
4k 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}); ...
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3answers
2k 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 ...
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2answers
3k 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 ...
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4answers
3k 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?
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3answers
11k 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.
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4answers
12k 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
798 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: ...
3
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1answer
874 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: ...
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1answer
254 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 ...
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2answers
2k views

Online service to transform coordinates from WGS84 to NZTM and NZMG

Has anyone come across a free web service / REST API to transform coordinates? I'm particularly interested in transforming from WGS84 to: New Zealand Geodetic Datum 2000 (NZGD2000 / NZTM) and New ...
3
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3answers
3k views

Transform Data with Microsoft Spatial SQL

Is there a way to transform geographic data in SQL Server 2008 R2? Specifically, I want to take Lat/Long data and convert it to a State Plane coordinate system.
3
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2answers
632 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 ...
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3answers
1k views

Transforming shp files to projected coordinate system

I have some KML files, polylines. I will convert them in grass to shp. How can I transform coordinates to some projected coordinate system? I was never doing it, so please help me. I need to transform ...
10
votes
2answers
14k views

Converting projected geoTiff to WGS84 with GDAL and Python

Apologies if the following question is somewhat stupid, but I am only VERY new to this whole GIS thing. I am trying to convert some projected geoTiff images to WGS84 using gdal in python. I have ...
5
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1answer
4k views

Converting Lambert Conformal Conic to WGS84 using Proj.4

I am attempting to transform data from Lambert Conformal Conic lat/long and I am having some issues with the results. The shapefile I am attemtping to transform can be found here: ...
5
votes
4answers
729 views

Given long, lat, x and y, how do I find the projection?

I am using an app called farsite that outputs shapefiles that show how forest fires will grow. I am getting output in coordinates as X and Y values rather than (lon,lat) and am looking for a ...
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3answers
13k views

Understanding Coordinate System Transformation in ArcMap?

For the Data Frame Properties on a map in ArcMap, what is the difference between selecting a new coordinate system and using a Transformation?
8
votes
1answer
771 views

WGS72 to NAD83- how to find correct transformation

I am trying to get this raster file to convert from WGS72 to NAD83, but ArcMap10 doesn't appear to have the correct transformation listed. Where can I find this transformation, and/or how do I import ...
3
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3answers
802 views

FME - Possible to return a value from workspace?

I'm calling my workspace from the command line (either via Python or .NET to a system/os call). I'm parsing DWGs and pushing attributes to SQL Server in the workspace. Either the data validates in the ...
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2answers
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How should I use GDAL to perform a transformation?

Greetings, I am a student who wishes to use GDAL to transform a series of images from Lambert Conformal Conic (EPSG: 9802) to Google Earth's WGS 84 (EPSG: 4326) for a web mapping project. I know ...
4
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1answer
3k views

Convert Gauss-Kruger to UTM

How to covert Gauss-Kruger coordinates to UTM coordinates with GeoTools java library? As I have figured out the location (zone, country) is important. I need the calculation for Slovenia.
6
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1answer
12k views

Transforming GCS_North_American_1983 to GCS_WGS_1984 using ArcGIS Desktop?

I posted Is there projection issue with Natural Resources Canada (NRC) Canada Atlas hydrology data? describing a shift in some of the NRC data (not all). Apparently, this shift has to do with ...
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2answers
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Using British National Grid Transformation OSGB_1936_To_WGS_1984_NGA_7PAR in ArcGIS Desktop?

In ArcGIS 10 a new transformation has been added for converting between WGS84 and British National Grid. What is OSGB_1936_To_WGS_1984_NGA_7PAR? How should it be used when compared with the ...
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4answers
2k views

Rubber sheeting in GRASS or QGIS

We are in the process of getting our property boundaries corrected and a side effect of this is that we need to move any assets that have been drawn relative to the property boundaries, so they are ...
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3answers
1k views

Retrieve polygon smallest MBR

I have a postgis table containing polygons. I want to transform my polygons to 4 points polygons : retrieve the smallest MBR. Here comes an illustration of what I want : My original polygon is ...
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1answer
2k views

How do I get a country border data set into my geography column?

I have a PostGis database with a multipolygon geography (as opposed to geometry) column. I'd like to fill it with the country border data available from ...
3
votes
1answer
766 views

Ordnance Survey data to WGS-84

Recently I have reprojected Ordnance Survey data from British National Grid (ORD SURV GB) to WGS-84 using ArcGIS 9.2. After re-projecting I have found some shift in the data. Can any body guide me ...