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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1answer
24 views

Is there a SQL Server package similar to Oracle's SDO_CS?

I see that Oracle's SDO_CS package is able to do datum transformations. I'd like to do datum transformations in SQL Server. I searched, but have not found something like this for SQL Server. Is ...
1
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2answers
17 views

Converting UK OS NGR coordinates to lat/long using ogr2ogr?

How do I convert UK OS NGR coordinates to lat/long using ogr2ogr? I've read through the ogr2ogr page, but I can't see anything obvious on how to do it I've used the FME trial and it was as simple as ...
0
votes
0answers
128 views

Georeferencing google earth historical images

I have been trying to raster and georeferenced an historical set of images from Google Earth but I am experiencing issues after done the first one properly. I save 4 images from Google Earth of the ...
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1answer
287 views

SharpMap Coordinate transformation Problem

I want to transform my layers from SRID 31463 (Gauß Krüger) to Webmercator. Since SharpMap does only know webmercator and WGS84 i tried to create the Coordinate System 31463 by WKT and applied it on ...
3
votes
3answers
2k views

Mercator: scale factor is changed along the meridians as a function of latitude?

"In Mercator projection the scale factor is changed along the meridians as a function of latitude" How to calculate the Mercator scale factor as a function of the latitude in decimal degrees ? ...
2
votes
1answer
201 views

How do I transform a point using NetTopologySuite?

I'm exploring how we can use NetTopologySuite to address a geoprocessing task. based on some code sample I found, I was able to piece together a sample application that reads a shapefile and checks if ...
0
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0answers
30 views

Displaying details of geographic transformation using Tkinter and ArcPy?

I am using Tkinter V8.5.15 and Python V2.7.8 I am writing a tkinter program using python v2.7 and I would like to display the details of a selected geographic transformation. Esri describe how to ...
5
votes
3answers
161 views

Determining coordinates of a SHP file

i have a SHP file of a building converted from a DXF file. This SHP file is unprojected and have no specific coordinates (origin 0,0). I find WGS84 coordinates (lat, long) of this building from Google ...
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0answers
25 views

How much error is should occur when using WGS84 to ECEF coordinates?

The method is not recommended for distances larger than 4km. I am getting reasonable accuracy in terms of the east and north bearings, but for the up direction I am getting error upwards of 1km for ...
14
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4answers
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.
0
votes
1answer
36 views

Determining coordinates for CAD file using ArcGIS for Desktop?

I have a CAD file of a building and I want it to be replaced on Google Maps with coordinates. The DXF-file is on a local coordinate system (undefined). I convert this file to SHP-file for editing. I ...
0
votes
1answer
295 views

Rotate Feature or Geometry OpenLayers 3

I would like to programmatically rotate a feature (or its associated geometry) in OpenLayers3. I know I can rotate the view, but I'd like to apply the rotation to the feature/geometry only.
0
votes
0answers
12 views

GeoApi transformation throws NotImplementedException

Im trying out GeoApi and Proj.Net for transformation of coordinates between coordinate system. The code below gives me an NotImplementedException for any transformation, I checked the source code and ...
2
votes
2answers
41 views

QGIS On the fly reprojection issue

i'm having an issue with QGIS 2.14.3 (Windows 10). I've two layers: PostGIS table (EPSG:23030) Shapefile (EPSG:25830) I setup on the fly transformation (23030) in QGIS, just for check, but both ...
1
vote
3answers
7k views

Convert geometry to latitude-longitude using PostGIS ST_Transform

My table has a geometric field, in EPSG:3857, of type point. I need the latitude and longitude, in EPSG: 4326, of each point. Could someone give me a valid example of how to use ST_Transform().
0
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0answers
34 views

Transform projection with SharpMap

I have SharpMap loading a shapefile and displaying the rendered image to a PictureBox. If I open the shapefile in QGis I can see the SRC: +proj=merc +lon_0=100 +lat_ts=-41 +x_0=0 +y_0=0 +datum=...
1
vote
1answer
39 views

rgdal / ggmap : rotate map data and clip map

I'm trying to plot a map of Toronto with ward boundaries and geocoded data on events over years. But the layout is such that I end up with mostly wasted space in the map. To increase resolution for ...
5
votes
2answers
220 views

Lat/Long -> UK Easting/Northing?

I have a fairly accurate formula (implemented in C#), which allows me to convert UK Eastings/Northings to WGS84 Latitudes and Longitudes. Despite extensive Google searches, I could not find a formula ...
0
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0answers
29 views

Algorithm for converting from projected coordinate system to geographic one using Helmert transformation

I have a data in projected coordinates system and I need to convert them to WGS84. I know the parameters of position vector transformation and I know the projection details of my projected coordinate ...
5
votes
2answers
95 views

Transform local polar coordinates to UTM

I have some field points disposed like the diagram below: In this diagram, I know: 1) Point A UTM coordinates 2) Distance between A and B 3) Distance between B and C 4) AB azimuth 5) BC ...
1
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0answers
56 views

projected coordinate system and transformation

I'm a beginner with GIS and I'm currently working on ArcGIS 10.3. I have two distinct shapfiles : one within the projected coordinate system "NTF_Paris_Lambert_Sud_France" and the second one within "...
4
votes
1answer
53 views

Converting from one Transverse Mercator based system to another produces inconsistencies

As a civil engineer, the one semester of survey training we had leaves my knowledge quite lacking in the field of coordinate systems. We're working on a project based in Gabon and we get information ...
0
votes
1answer
40 views

Can gdalwarp reproject from ESPG:4326 (WGS84) to UTM?

I've a GeoTIFF image in ESPG:4326 (WGS84) and when I try with gdalwarp to reproject to UTM, it has problem gdalwarp -s_srs "EPSG:4326" -t_srs '+proj=utm +zone=33 +datum=WGS84 +units=m +no_defs' -of ...
0
votes
1answer
34 views

use of gdaltransform in C# code

I have a problem to use correctly gdaltransform in a C# project to transform a set of coordinates from a crs to another. If first try in console command and this line is working good my inpufile ...
1
vote
1answer
78 views

(Arcpy) read values from a txt file and convert the data into a shapefile

I´m a beginner at python programming and wanted to start with a litte and hopefully simple project. I tried to read float values out of a textfile and write them into a shapefile. The program is ...
0
votes
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
votes
1answer
40 views

VDatum helmert transform parameters

I'm trying to use NOAA's VDatum to verify the NAVD88 -> WGS84 datum conversion in a c++ datum conversion library that I've written. The answers didn't agree, so I attempted to check a simple ITRF2008 ...
3
votes
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 ...
5
votes
3answers
116 views

Are perpendicular lines still perpendicular after converting from UTM zone 15 to 16 (or between two neighboring zones)?

I want to convert a square polygon that is close to the edge of UTM zones 15N and 16N. The polygon's coordinates are in UTM 16N, but it is spatially positioned in the UTM15 area. My question is that ...
0
votes
0answers
23 views

GCS_Clarke_1880 transformation to GCS_WGS_1984 in ArcGIS 10.3.1

ArcGIS 10.3.1 has no transformation for GCS_Clarke_1880 to GCS_WGS_1984. Why is this the case, what have I missed? Do we have to write a custom transformation? There are a heap of Clarke ...
0
votes
1answer
179 views

How to Transform Many Projections Into One With SQL Server

I know very little SQL Server, but am quite familiar with Arc and Python. The data I want to transform is point data which is in a single table [ID], [X] [Y], [COORDSYS]. There are 5 possible ...
2
votes
3answers
2k 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) { NetTopologySuite.IO....
2
votes
1answer
62 views

How to correct ArcMap re-projection

In ArcMap, I add a layer from ArcGIS web server projected in "Bessel 1841 Transverse Mercator". Then I add new layer as a base map from ArcGIS online web server. This is the result: Shift is ...
1
vote
3answers
154 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
1answer
2k views

PROJ4 C++ API: Amersfoort RD New to WGS84

I try to convert between dutch RD New (EPSG:28992) and WGS84 (EPSG:4326) via PROJ4 C++ API. On the console this works with: cs2cs +proj=sterea +lat_0=52.15616055555555 +lon_0=5.38763888888889 +k=0....
2
votes
0answers
41 views

UTM to Latitude/Longitude

I've coded up Karney's transformations from UTM to latitude/longitude coordinates. My work however requires me to know if this conversion is in geocentric or geodetic latitude. I have not been able to ...
0
votes
1answer
34 views

Fiona and Pyproj incorrect transformation (feet to meter)

I am trying to reproject a shapefile from EPSG:2229 (NAD83 / California zone 5 (ftUS)) to EPSG:2163 (US National Atlas Equal Area (meters)). Below is the code that does this transformation for a ...
0
votes
1answer
91 views

LAStools (3D Analyst) scale factor application

I'm trying to use the las2las (transform) module from the LASTools toolset to apply a scale factor to an LAS dataset. The problem is that the client wants us to apply the scale factor from a known XY ...
0
votes
3answers
32 views

Transform/Align Census 2000 Blocks to Census 2010 Blocks

I would like to align census tabulation blocks from the 2000 and 2010 censuses. I have the relationship file, so I know which blocks are suppose to the same and which were split or consolidated. ...
1
vote
1answer
36 views

convert REGCAN95 coordinates to OpenStreetMap coordinates (WGS84-Form in lat/long)

I have some coordinates in datum REGCAN95, and I want to know how to convert them to something usable in OpenStreetMap. I have found that REGCAN95 uses the EPSG codes as follows: 4082 REGCAN95 for ...
4
votes
1answer
118 views

Point Coordinates Conversion with unknown system

I've been using QGis for few weeks now. Although this site always came very helpful, I can't find solution to my recent problem: I have few points, and know their coordinates in "WGS-84" and "ISN-93" ...
1
vote
1answer
295 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 ...
1
vote
1answer
39 views

Transform Natural Earth data to 27700

I'd like to know how (if possible) to transform the shapefiles I've downloaded from the natural earth datasets which are in EPSG:4326 to BNG EPSG:27700. So far I've loaded the shapefiles I need into ...
0
votes
0answers
36 views

Finding GeoTIFF GeoTransform when camera position is known

In short, I want to create a GeoTIFF from aerial images taken with a camera whose position (x, y, z, roll, pitch, yaw) and parameters (focal length etc.) are known. No ground control points are known. ...
2
votes
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 ...
2
votes
1answer
34 views

Transformation from EPSG 2178 to EPSG 4326 gml.file?

How can I transform .gml file from EPSG 2178 to EPSG 4326? I used the following without success: gdaltransform -s_srs EPSG:2178 -t_srs EPSG:4326 "file1.gml"
0
votes
0answers
44 views

Problem with adding GeoJSON to OpenLayers 3

I transformed (.geojson file)from EPSG 2180 to 4326 using ogr2ogr -f "GML" -lco GEOMETRY=AS_XY -t_srs EPSG:4326 test.geojson file.geojson I would like to add to map, but I received this error : ...
0
votes
0answers
75 views

GeoServer SLD Filter rule before PointStacker transformation

I'm trying to apply a filter rule in an SLD, before applying the GeoServer PointStacker transformation (which groups points that are too close to distinguish their icons). This transformation is ...
0
votes
1answer
51 views

Failed to export vector file from OGR?

I use to transform data points from UTM (WGS84) to WGS84 EPSG:4326. Basically from UTM to Geographic coordinate system both in (WGS84). I tried to do it again but an error message appears. ...
2
votes
1answer
215 views

Unable to transform from EPSG:3857 to UTM in Geotools

I'm using Geotools to perform some transformations between coordinate reference systems. I created a proof of concept taking data from Google Earth, which uses ESPG:4326, and converting it to UTM. ...