Tagged Questions

The process of translating a map or spatial data from one geographic projection to another

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6
votes
1answer
253 views

Problem reprojecting LIDAR data with Liblas

I am currently trying to reproject a LIDAR file (.las) using the Open-Source LibLAS, compiled on a Scientific Linux server. The Original data is in Oregon Lambert, NAD83 (EPSG:2992), and I am trying ...
1
vote
1answer
125 views

Geographic Transformation

I have an Image with the following metadata: Projection Information : Projection Zone : 0 Spheroid Name : Modified Everest Georeferenced to : RSO Map Information : Upper Left ...
1
vote
0answers
264 views

Reprojecting GeoTIFFs to WGS84/UTM

I'm using libgeotiff and proj4 to read and (try to!) process GeoTIFFs. After reading the file, I want to get the corner coordinates in WGS84/UTM - but there are so many functions and parameters to try ...
2
votes
1answer
252 views

Transformation from WGS1984 to ITRF2008

We are using Projected Coordinate System: Ain_el_Abd_UTM_Zone_39N (Transverse_Mercator) in our GPS Devices and have valuable Coordinate data. Can I change the projection of this data this to WGS 1984 ...
2
votes
1answer
102 views

Find projection from dataset

I have a dataset that I have pulled from a MaxSea 3d database. I am trying to figure out what projection is used, so I can transform and use the data. I have tried following this guide ...
2
votes
1answer
367 views

Reprojecting Natural Earth “Admin 0 – Countries” shapefile to Web Mercator

I haven't received a reply posting this same question on the Natural Earth forums, so I figured I'd give it a try here. I’m trying to reproject the 1:10m "Admin 0 – Countries" shapefile into a Web ...
0
votes
1answer
103 views

I have line strings in points and need to conver them to lon/lat degrees

I need to convert line strings back to latitude & longitude coordinates. Here are is an example, please keep in mind that they do NOT reference the same point. I have included the values to ...
2
votes
1answer
275 views

Confused about reprojecting Google Maps (latlong) to Irish Grid TM65

Trying to transform points taken from Google maps (as latitude and longitude) to Irish Grid TM65 using the spTransform in R, and I'm confused on something. Everything I find on the net tells me ...
2
votes
0answers
320 views

Geoserver - empty native SRS field

I'm converting layers from shape files to postgis with the below command: shp2pgsql -s 22175 -c -W "latin1" path/file.dbf' table_name db_name | psql -d db_name Next, I add this layer to the ...
1
vote
0answers
119 views

Trying to convert to EPSG:27700 (Ordnance Survey) projection, unable to do so

I'm trying to code an interface that allows a user to draw a vector shape on openstreetmap, which is then converted to a WKT string, processed by the server and sent of as a WFS query to emapsite ...
5
votes
1answer
199 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
1answer
160 views

How to get a correct scalebar in QGIS?

I apparently have a problem with getting meaningful scalebar values referred to a shapefile in QGIS. I think I tried all solutions suggested in other discussions, but still I don't get it. I use QGIS ...
1
vote
3answers
170 views

Copy>Paste from meter to feet coord-sys, and coordinates don't change in ArcMap 10

My dataframe coordinate system is in UTM with linear unit Meter. If I have a Polygon shapefile in a UTM coordinate system with a linear unit of Foot_US and I am sent a shapefile in the same UTM ...
1
vote
0answers
102 views

MGRS square identifier to polygon

I'm looking for a function/formula/library that basically takes a MGRS square identifier such as 4QFJ16 and returns me the coordinates of the 4 corners of this polygon in some simple form such as ...
1
vote
2answers
705 views

OGR Projection transformation error

I am trying to convert shapefile that was created by FME in EPSG:900913 to EPSG:3857 (I know its the same definition) with OGR in a script. datasource = ogr.Open(os.path.join(dirname,shapefileName)) ...
0
votes
0answers
151 views

How to find out what projection my data is using?

I have a set of data that I created from gps locations of images. The locations are in decimal. I don't know what projection was used when the data was captured. I used QGIS to display the data with a ...
1
vote
0answers
525 views

GPS Coordinates to WKID 102100

I'm currently creating a project for ios and I'm using the latest ArcGIS IOS api. I have a mapView that is using the spatial reference skid 102100 and i am receiving lat long coordinates from an ...
0
votes
0answers
64 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
1answer
192 views

Drawing on jpg-map image with proj4 (perl)

From the point of view GIS professionals this question will be sure very primitive, but please keep in mind - i'm totally newbie in this area - and this is my 1st question here. Have several GPS ...
3
votes
2answers
324 views

informations about “gdaltransform” utility of GDAL

I have a doubt about GDAL reprojection. I use "gdalwarp" utility to reproject an image in a specific projection system (for example WGS84 UTM49). "gdalinfo" on original image displays this corner ...
4
votes
1answer
596 views

How to properly assign spatial reference to converted AutoCAD data?

I know this is a frequent problem, I myself confronted with this problem many times, yet somehow each Autocad dataset I received is different (although they're from the same area). To some data, the ...
0
votes
1answer
68 views

How to smooth XY Co-ordinates of linear feature?

I need to smooth xy co-ordinates. see the image: In this case, i need to remove 5,6,7,8 and 9th co-ordinates or need to make those co-ordinates as a straight line between 4th and 5th. is there any ...
0
votes
2answers
645 views

Tile script (Mapnik) with OpenLayers - Problem with projection (900913)

I use Mapnik python bindings in a geodjango application to render tiles in openlayers with datasource stored in postGIS in 900913 projection. The feature seems to be rendered correctly in the ...
0
votes
1answer
203 views

Orthographic reprojection with mapnik

I am trying to create a google earth like wep application. My problem is that I can't get to render a full view of the earth. The zoom_all() function generates the following error : RuntimeError: ...
1
vote
3answers
2k views

Openlayers vector feature coordinates are not transforming,

I have a OpenLayers vector with a single feature [0]. It's coordinates are in the map projection (EPSG:3413) and I want them in WGS84 (EPSG:4326) decimal degrees. I have the following code which ...
2
votes
1answer
253 views

ArcGIS JS API Polygon's WKID conversion with gsvc.project

I'm trying to convert polygon from wkid 3301 to wkid 4326. I've been using this code snippet for converting points, but I'm not sure how I would accomplish this to create a polygon object. I'm not ...
0
votes
0answers
267 views

Getting: org.opengis.referencing.NoSuchIdentifierException: No transform for classification “Transverse Mercator Zoned Grid System” with geotools

Using geotools I've been trying to create a referenced envelope after converting/reprojecting from WGS 84 to UTM with specific zones and it seems that either I need to do something with authority ...
3
votes
2answers
137 views

Performance loss for OpenLayers EPSG transformation? Storing GeoJSON coordinates in lat/lon or in native map projection?

For a project the map projection is EPSG:32468 (tiles). On top of the map, two or three GeoJSON LineStrings should be displayed using OpenLayers. Each LineString has about 1500 coordinates. ...
1
vote
1answer
267 views

R: data.frame to raster object error

I have a data.frame consisting of a points with an associated continuos value and their X,Y coordinates. Altough it's not stored anywhere it's projection is a Lambert conformal conic. I think this is ...
4
votes
3answers
154 views

How to transform FileGDB featureclasses from custom local coordinate system?

Background: Started working for company that is in middle of system-wide IT upgrade including GIS data. Existing in-house data is in a FileGDB, is in an assumed coordinate system and represents 1000 ...
1
vote
1answer
276 views

British National Grid to KML results in offset polygons

I have a shape file of English wards from ONS. It is similar to the files available here: http://www.ons.gov.uk/ons/guide-method/geography/products/census/spatial/2011/index.html except I had to ...
3
votes
1answer
200 views

Why does FME Reprojector create coordinate values 0?

I'm using the NeighborFinder transformer in FME Desktop 2013, and I need it to use a maximum distance in meters. My input data, however, are points and lines in WGS84, so before sending them into the ...
2
votes
1answer
287 views

Transformation of user-defined projected coordinatesystems

I want to transform from one projected coordinate system (pcs) to another using ArcGIS 10. Unfortunatelly the starting system is not predefind by ESRI and thus I´m not sure the software is doing what ...
2
votes
1answer
82 views

Ok to measure and union a projected-on-the-fly shapefile in ArcMap?

I have a dataframe in arcMap 10.0.4 that is of Africa Albers Equal Area Conic PCS. I bring in a census shapefile of WGS 1984 CS and it is projected on the fly. I do 2 things: I use the calculate ...
1
vote
1answer
97 views

Vector Layers are not lining up and are scaled differently

Hey I am a first time user of GIS and I am working for a transportation map of North Carolina for a project at my work. So what I have been doing is first placing the Tiger County Boundary by using ...
1
vote
2answers
186 views

Problem with reprojecting raster from MGI 6 to WGS

When I reproject a raster from Mgi 6 to WGS 84 using Warp in Quantum gis it makes mistake ( about 380m). Is there any way to avoid this?
1
vote
1answer
145 views

Modify CRS to match boundaries of shapefile

I have boundary data in WGS'84 lat/long and data in a custom generated CRS. The data in the generated CRS appears to be offset by a particular vector compared to WGS'84. I want to attempt to match the ...
1
vote
2answers
492 views

How to convert OSM data to a projected Coordinate system

What is the easiest way to get OSM data into a shapefile projected data format for QGIS? Sounds simple but I've run into problems with this before.
2
votes
1answer
472 views

Reproject raster catalog - ArcGIS 9.3/FME 2012

I have a couple of raster catalogs in different file geodatabases and I need to re-project them to a new coordinate system. Now there is no option to project a whole raster catalog, nor can I use the ...
2
votes
3answers
409 views

Coordinate System (Malaysia RSO Projection) not lining up in QGIS and ArcGIS for Desktop?

I am using QGIS 1.9.0 on Linux Mint; and I am new to (Q)GIS I have three layers (2xshapefiles, 1xopenlayer[Bing Maps]) that I am trying to line up located in peninsular Malaysia. Shapefile_1 is a ...
0
votes
1answer
207 views

constant deviation projecting lat lon to itm(israel tranverse mercator

i use two different ways to project lat lon data taken from google earth to ITM (Israel Transverse Mercator) and export the data to arcmap same ways i try to unproject ITM data and export the data to ...
1
vote
1answer
82 views

Shapefile CRS damaged. How to bring it back?

I have two shapefiles with same location and extends (EPSG 4326). But one of the shapefiles CRS seems to be damaged after doing a lot wrong with reprojection... its not shown on the same position as ...
4
votes
2answers
787 views

Cartesian world sized projection WKT/EPSG code?

I am after the EPSG code or Well Known Text (WKT) of a projection that puts the centre of the earth a 0,0,0 and each point is a cartesian XYZ distance from that. My existing data is in WGS84 ...
6
votes
1answer
105 views

Should I Reproject Data Which Has Been Captured Incorrectly?

I'm working on a project for a client which is migrating data from an Oracle database to an ESRI Geodatabase. When data for this project was initially captured over 15 years ago, the coordinate ...
1
vote
3answers
4k views

Geographic Coordinate System to Projected Coordinate System

I am trying to convert a shapefile from GCS to PCS to calculate the area of each polygon. I have tried two different methods: 1) "Data Management Tools->Projections and Transformations->Define ...
2
votes
1answer
117 views

CRS Austrian Lambert/WGS84

I am totally new to Qgis (or GIS in total): My problem is to get two layers in same CRS to do an intersection and further analysis described in the blog of underdark (Groupstat tutorial). My is the ...
1
vote
0answers
70 views

Projection for Tracking a Vehicle

I'm looking for the best coordinate system projection to use for cartesian calculations while a vehicle is running from its starting location to about 100 miles from that spot. The offline format ...
1
vote
1answer
83 views

Setting coordinate systems in gvSIG: workflow or transformation issues

I am learning how to use gvSIG 1.10 (Mac OS 10.6.8 Snow Leopard). My goal is to create a simple county map of Illinois using the base data shapefiles available from the Illinois Natural Resources ...
5
votes
1answer
774 views

Does anyone know the proj4 Coordinte Reference System command line for Rectangular Polyconic Gores?

I am a GIS beginner using QGIS 1.8.0 I am trying to transform a world map from the standard WGS84 Coordinate Projection System to a set of rectangular polyconic gores, with a gore count of 12. ...
2
votes
2answers
145 views

QGIS 1.8 on Ubuntu 12.04 doesn't transform CRS properly

I have a weird QGIS-Problem that only occurs in Ubuntu 12.04, but not in Windows 7. I've also tried this on different Ubuntu-Computers. When I try to transform a layer with WGS84 to a different ...