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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53 views

Correct georeferenced LiDAR data

Often I obtain LIDAR data for concept studies and conventional survey (in dxf format) over a small portion of this. The LIDAR typically covers the broader area and is used for broader studies, ...
0
votes
1answer
14 views

Transforming a PNG from RD_new to WGS84

I got the request to transform a PNG in RD_new to WGS84. Is this possible? I was thinking of changing the accompanied world file its coordinates. I do not think it is possible to load in a png in a ...
3
votes
2answers
743 views

Coordinate system of a MODIS file to be introduced in GDAL for transformation

I am working on MODIS data using GDAL. When I extract coordinate system information of the files I got this: Coordinate System is: PROJCS["unnamed", GEOGCS["Unknown datum based upon the custom ...
4
votes
2answers
60 views

QGIS batch shp transform

I have a large number of shape files in OSGB (EPSG:7405), with no .prj file that I would like to convert to WGS84 (EPSG:4326). Can you let me know if this is possible in Qgis and, if so, how, and, if ...
1
vote
2answers
56 views

GDAL rotate DEM

Is it possible using any of the command line GDL tools such as gdalwarp, etc to perform a rotation of DEM data - a GeoTiff for example? Would I be better off converting (with gdal_translate) the ...
3
votes
1answer
409 views

Rotating rasters using GDAL Geotransform (and ArcGIS Desktop)

I am working on a GDAL driver for a proprietary grid-format. In some cases, the grids are rotated in order to get smaller file sizes. In my GDAL geotransform array, I do the following (showing a ...
0
votes
1answer
128 views

Rotating raster grids using ArcObjects changes cell size in ArcGIS Desktop?

I am using ArcObjects, namely RasterGeometryProc, to apply rotation on grids. The transformation works fine. However, when looking at the grids properties in ArcGis, the cell sizes has changed. ...
1
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1answer
37 views

Transform coordinates in MapInfo with GSB data

Does anybody know if MapInfo (or MapBasic) is capable to do coordinate transformation using the NTv2 (National Transformation version 2) method? Currently Switzerland changes their national ...
0
votes
1answer
283 views

How to transform/convert Coordinate Reference System with Proj4 and php

Basically my question is: Can I combine the functions of proj4 with php in my server? For example, I would like to know if it is possible get data in WGS84 and transform in ETRS89. I need to get ...
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0answers
16 views

Transforming Data using 2D Costum Transformation in Arcmap 10.2 for Desktop

I have ArcMap layers of roads, buildings etc. in one reference system (Israel_TM). I need to transfrom all this data (while keeping the topology) to pixel-space "reference system". I have already ...
1
vote
2answers
28 views

Shifting .dwg file to align with a shapefile

I'm trying to integrate data in a .dwg file collected by surveyors into an ArcView 10.2 project I have projected as NAD83 UTM Zone 10 N. The survey data is in an undefined coordinate system but I ...
2
votes
2answers
97 views

Digitized Shapefile manually using wrong projection: how to fix it?

I have a 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 ...
4
votes
1answer
140 views

Transform shapefile to WGS:84 (EPSG: 4326) in Qgis

I am struggeling with an enoying problem here. I received several shapefiles from an colleague that he told me is in WGS:84. If I look at the metadata in Qgis it tells me the following: In layer ...
4
votes
1answer
4k 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 ...
11
votes
3answers
6k 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.
2
votes
0answers
79 views

Using ST_Affine() and trans_param() functions on vector layer

After reading this post How to georeference a vector layer with control points? I decided to give it a try to move/rotation/scale a polygon using Postgis. I have two polygons, polygon_from and ...
3
votes
2answers
279 views

Is there a vector affine transformation tool in QGIS2?

In QGIS 1.8, I can transform my point layer with the plugin "Affine transformation". So, this plugin don't exist in QGIS 2.0. Do you know a method to simply translate (i.e : X -> X+30000) in QGIS 2 ? ...
5
votes
1answer
167 views

Moving a shape around the earth while maintaining the proper projection

What is the transformation needed to be taken on every data point of a shape to rotate that shape around the globe. I'm trying to figure out the math behind this kind of transformation so I can ...
2
votes
1answer
627 views

Using Affine Transformation to expand polygons in QGIS

I have a shape file, and I'd like to grow each feature by 13.7% or 14%. The program crashes every-time I try to use affine transformation. Any recommendations? I don't have a license for ARCgis. ...
0
votes
2answers
39 views

Transforming Shapely Polygon and MultiPolygon objects

Is there an easy way of transforming Shapely objects (namely, Polygons and MultiPolygons) from one projection to another without having to dig around and extract coordinates by hand? In fact, I ...
1
vote
1answer
23 views

Aligning data in GCS_North_American_1983 and GCS_North_American_1927 using ArcGIS for Desktop?

I have tried everything that I have found on this site so far and nothing has worked! I have used ArcGIS for 3 years but had never had to mess with coordinate systems as the 1st company I worked for ...
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0answers
48 views

Coordinate transformation/reprojection using DotSpatial

need some help. The following piece og code worked with an older version of DotSpatial. public static Geometry Project_EPSG25832_To_EPSG3857(byte[] wkb, int SRID) { ...
2
votes
4answers
2k 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 ...
5
votes
2answers
218 views

Transformation parameters for Everest datum to WGS84

I have a shapefile with the following projection information: ...
0
votes
1answer
39 views

Proper transformation file to go from NAD83 CSRS UTM 17 to NAD83 UTM 17

Looking to determine which transformation file to select when using the Project tool in ArcMap 10.2.2 to go from NAD83 CSRS UTM 17 and NAD 83 UTM 17. The data I am working with is from Geogratis and ...
2
votes
0answers
22 views

Geoserver : create a rasterized polygon / dynamic fill for polygons with features from database

I decided to post here because I couldn't find any answer to my problems on the internet. So I am using geoserver 2.7-SNAPSHOT, everything is working fine but I need to implement a new function or ...
1
vote
1answer
46 views

ITRF2008 to WGS84 Datum Transformation in ArcMap?

If I have data in IRTF2008 as shapefile is it possible to change this to WGS84 and how? The need for this comes when trying to display the data in a third party program that doesn't recognize the ...
3
votes
2answers
41 views

Compensating lat/long offsets after conversions

In my application I am doing conversions between two different formats of data. First format is a simple one containing NE and SW coordinates for a given rectangular area: area = { "sw": { ...
1
vote
1answer
28 views

how to transfer a geotif with WGS84 to a mercator array for ploting it with matplotlib.basemap

I want to plot data from a sensor raster file (tif) to a map using basemap. I have a geotif with 'WGS 84' >>> gtif = gdal.Open("example.tif") >>> print gtif.GetProjectionRef() ...
2
votes
1answer
61 views

How to export projected layers with relative cartesian (x,y) coordinates in ArcGIS

I've got several GIS datasets for a national park in South Africa (elevation map, water points, elephant density and such). I have access to the full ArcGIS Desktop Advanced suite, but am no GIS ...
2
votes
2answers
108 views

ArcGIS Desktop:Transformations: Geographic vs Projected?

Arc10. I have two data sets (both CSV files w/ lat and long columns) and I am working on standardizing them to the same projection. File1: NAD27; File2: NAD27, WGS84, and NAD83. I would like all of ...
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2answers
88 views

Convert a grid file from one set of coordinate systems to another

I have a grid file in a certain coordinate system. I'd like to change it so I have the same grid in geographic lat/long based on WGS84. This seems like something that gdal can tackle quite easily ...
1
vote
1answer
44 views

NAD27 to NAD83, saving AFTER transformation?

I need to measure the distance (with the ruler) of points from two different layers. One layer is NAD83 and the other is NAD27. When importing the NAD27 csv file, I specified it was NAD27. Then I ...
1
vote
1answer
32 views

Transform from WGS84 to Cylindrical Equal Area

What transformation should I use to go from GCS_WGS_1984 to Sphere_Cylindrical_Equal_Area? I am using Arc to project a dataset over for and area calculation and then will project it back.
2
votes
1answer
237 views

Slight translation with coordinate-transformation from Gauss-Kruger to WGS 84. Possible Reasons?

I have a number of points in Gauss-Kruger, Zone 3 that I want to convert to display them within Google-Earth. Assuming WGS84 for Google-Earth the transformed coordinated differ from the original ones ...
10
votes
2answers
8k 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 ...
2
votes
1answer
96 views

Re-project from Polar projection to EPSG:4326

I simply want to project a polar stereographic raster (EPSG:3411) to Mercator (EPSG:3857) or WGS84 (EPSG:4326). The data I is from NOAA. $gdalwarp -s_srs EPSG:3411 -t_srs EPSG:3857 northpsg.20141027 ...
0
votes
2answers
119 views

Converting coordinates to 4326 for Google Maps.

I have a MultiLinestring, example coordinates, (698745.50201423 4210011.04002000) and I would like to convert them to something like (24.362 42.458) to use in Google Maps. When I try to get the SRID ...
2
votes
1answer
47 views

How to use qgis coordinate transformation in user code

I am now working with coordinate transformations between different CRSs, e.g. latlong to UTM. After comparisons, I found out that the coordinate capture plugin in QGIS is quite accurate for the ...
3
votes
1answer
84 views

Double transformation of marker in Carto CSS

I need to show on the map the direction of the road traffic with arrows. For this purpose I use markers for Carto CSS in TileMill. If the road has in OSM tag oneway="yes" or oneway="1", all is ok, ...
2
votes
3answers
79 views

matching coordinate systems by transforming and projecting

matching coordinate systems of all my data (transforming, projecting) My data uses the GCS_Bessel_1841 coordinate system. Would there be any inaccuracies if i would transform it to DHDN 3-Degree ...
1
vote
1answer
74 views

Automatically georectify raw Landsat scenes

I am working with 20 raw Landsat images downloaded from GloVis, in WGS 84 (EPSG 32634) coordinate system. I need to geometrically correct them to S_JTSK (EPSG 5514). Usually, georectification is done ...
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vote
2answers
83 views

Tasseled Cap Transformation on MODIS in GRASS

I would like to know how to perform a Tasseled Cap Transformation on MODIS, in GRASS. I've found this https://searchcode.com/codesearch/view/19063909/ but I don't know if this has been tested. I'm ...
1
vote
0answers
53 views

Clustering the WGS84 point features (projection transformation aspects)

My question is quite trivial and was discussed many times before (like here) but in our case it has the confounding extra requirements... The list of sparsely distributed 2d point features is stored ...
1
vote
1answer
40 views

Geographic -> UTM Raster Rectification

I'm trying to use an image overlay in KML / Google Earth as the basis for adding extra info and returning this to Google Earth. In my utility app I can specify a rectangle to give me the ...
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vote
0answers
46 views

How use DataFrame Geographic Transformation User Interface with ArcObjects?

I am bringing data from SQL Server into ArcMap with ArcObjects as a Query Layer. If I do this manually, a 'Geographic Coordinate System Transformations' UI pops up. I would like the same thing to ...
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vote
2answers
197 views

Transforming and Projecting Shapefiles in R & ArcGIS for Desktop?

Perhaps this is an issue with one of my original data sources, but I've searched extensively to address this problem both through ArcGIS and R. I've got 2 separate sources of a county layer SourceA ...
0
votes
0answers
43 views

Precision loss when transforming coordinates systems in GDAL (vector layers)

Anybody knows the order of magnitude of the error introduced when transforming coordinates using GDAL? More specifically, I would like to know if significant error is introduced when the ...
0
votes
0answers
42 views

Node.js transformation from NAD83 to WGS84

I've used the excellent npm shapefile library to import Canadian electoral districts into MongoDB. Here's a sample file: http://ftp2.cits.rncan.gc.ca/pub/geott/electoral/2011/fed308.2011.zip Is ...
0
votes
2answers
121 views

Defining a scale number from the Helmert transformation

I know this is more bit of a cartographic issue, but maybe somebody would be able to help. I have an old map georeferenced to the openstreetmap with 50 identical points. I want to get the scale of the ...