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

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Command line tool for reading .shp, .prj and converting to Google Maps lat lngs

I have a data file exported from an ARCGIS system (parcel data from local government). Its a zip file containing 7 files: f.dbf, f.prj, f.sbn, f.sbx, f.shp, f.shp.xml, f.shx. I have a simple ruby ...
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276 views

GeoTools, convert CRS for Google Maps

I'm trying to use GeoTools to convert coordinates from EPSG:3857 to various CRS, in order to display WMS layers on a Google Map. For example, I want to display a layer in the EPSG:4326 CRS. I have ...
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2answers
105 views

How to project data into both a Vertical & Horizontal Coordinate System?

I have a shapefile whose Geometry is of POINTZM type. The XY coordinate System is NAD_1983_CORS96_StatePlane_North_Carolina_FIPS_3200_Ft_US and the Z coordinate system is ...
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1answer
493 views

Coordinate extraction in a different projection in MapInfo

I have a .TAB file of polyline objects in British Grid Coordinate. I need to extract the end points/nodes of each polyline and find their latitude/longitude (WGS84).
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46 views

Coordinate System Mismatch

I understand that coordinate system mismatches between layers is a relatively common problem. Nevertheless, exploring other posts hasn't helped me understand my issue. In short, I have a DEM raster ...
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20 views

convert/reproject netcdf to png [closed]

I have a netcdf file with GTG data in it that I need to warp and convert to a PNG for EPSG:4326 and EPGS:3857. Information from the file: Variables: var ...
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1answer
43 views

Understanding GDAL ERROR 1: Too many points… failed to transform?

How can one trace the source of the following error when using gdalwarp? (I'm very new to GIS, GDAL and python!) Warning 1: Unable to compute source region for output window 0,0,5789,4748, ...
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1answer
22 views

gdalwarp reprojects only a portion of the raster

I´m trying to re-project a raster from epsg:4326 to epsg:3035 to work with European based datasets. I have been using this command: gdalwarp -srcnodata 9.95924e+36 -dstnodata 9.95924e+36 -s_srs epsg:...
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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 ? ...
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12 views

Converting radiance raster values to luminance

I have two nightlight data layers of the same area, one is a VIIRS radiance raster (the raster values are radiance values in units of nanowatt/sq.cm/sr) and the other one is a point vector luminance ...
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11k views

How to convert MGRS to Lat/Long or UTM?

Can anyone please guide me on converting Military Grid Reference System (MGRS) to lat/long or UTM.
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1answer
267 views

Adding points defined by Latitude and Longitude to map using QGIS?

I have an OS map on which I want to display points defined by Latitude and Longitude, but the map coo-ordinates have values I do not recognise or understand. The image shows the map, with my first ...
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1answer
2k 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 ...
2
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1answer
200 views

Why am I losing part of my raster when I reproject?

QGIS 2.0 Working with tiff raster file. Reprojections are in WGS84 Mercator. Here is my problem: I am trying to use buffers or urban areas to analyze light intensity on a raster layer. I want 30 ...
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2answers
268 views

How to calculate the bounding box in projected coordinates?

I'm using GDAL in Python to reproject rasters. I'd like to be able to take an existing raster, and project it into a new raster to my projection and output pixel size of choice. I'm worried about ...
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0answers
20 views

Make “Nodata” transparent in raster - Mapfile/Mapserver

I have a raster and I'm trying to make it display in Openlayers2, using Mapserver 7.0 in backend. My problem is, I think, that because the online map is not the same projection as my data, Mapserver (...
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2answers
33 views

R - Easy way to reproject an extent object

I have an extent object that I would like to re-project to lat and lon. >outer_extent outer_extent class : Extent xmin : -5559753 xmax : -4447753 ymin ...
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564 views

More accurate way to calculate area of rasters

In my daily work, I am constantly asked to calculate areas of global raster datasets in geographic projection at 30 arc second resolution. These datasets are normally the result of a Combine operation ...
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20 views

How to extract EVI from MODIS hdf data from several time using MRT?

I have been using Modis Reprojection Tool (MRT) to extract EVI from MODIS hdf files. So I have 23 MODIS hdf files from 1 year (16 days temporal) but from the same scene (h28v09). How to extract EVI ...
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1answer
25 views

Can reference system in Leaflet be changed without disrupting data position?

I have a leaflet map that uses default CRS (EPSG3857) with multiple markers placed on it. Their LatLng are read from JSON file. I want to change map CRS to Simple, keeping markers on exact same screen ...
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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 ...
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621 views

how to reproject data in EPSG:4326 to 3857 using SharpMapv0.9 for display on google maps

I have data stored in SQL Server 2012 in EPSG:4326. I need to display this data on a google map in 3857. but without an ST_Transform function, I cannot determine how to convert my data on the fly to ...
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2answers
1k views

GDAL/proj4 equirectangular projection coordinate system units assumed by OGRSpatialReference and GDALDataset::GetGeoTransform()?

How do I configure my OGRSpatialReference object to specify an equirectangular projection system http://en.wikipedia.org/wiki/Equirectangular_projection where the affine geo-transform matrix (provided ...
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2answers
188 views

Since ArcMap Projects data “on the fly” why aren't these data sets aligning?

I have a polygon feature class in NAD_1983_UTM_Zone_13N (Green in map). I projected it to NAD_1927_StatePlane_New_Mexico_East_FIPS_3001 (Pink in map). Why are these not aligning? Does this mean the ...
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1answer
43 views

QGIS Reprojecting a layer CRS

I have a series of layers of lines (shapefiles) in My Project. The CRS of some are different and to merge them they all must have same CRS. When I use Processing/Toolbox/Qgis_algorithims/...
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40 views

Gdalwarp UTM reprojection causes image distortions

I'm trying to re-project Sentinel-2 images to a common UTM zone in order to create a mosaic. For this I'm using gdalwarp with the following syntax: C:/OSGeo4W64/OSGeo4W.bat; gdalwarp -t_srs \"+proj=...
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2answers
108 views

Reproject raster without projection info

I'm pretty new to gdal and got a presumably easy question for experienced gdal users. My problem: I have a raster ascii file of which I don't know the projection or epsg code. However, I want this ...
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1answer
111 views

Why does the difference between two overlapping rasters exist?

I have two similar rasters of the Mount Vesuvius: one spans 20 kilometers, and the other one 50 kilometers. Both rasters are in WGS84 geographic coordinate system, and they overlap between each other: ...
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16 views

WKT for Local Mine Grid (Again)

I came across WKT for local mine grid which is very close to the question I have. Unfortunately that post doesn't detail a method that I can repeat, just a very good solution. I too would like the ...
2
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1answer
47 views

Problems with matching vector data with raster data

I’m new in Arcgis, and I have some trouble in this task: I downloaded from ICC (www.icc.cat) a raster data map that is a in a specific coordinate system, if I right click to view its properties, it ...
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224 views

Defining coordinate reference system with rotation in GeoServer?

I am using GeoServer and have a layer in EPSG:900913 ("Google Mercator"). I need to "rotate" the map around certain point (say, 1500000, 7000000) by certain degree (say, 30 degrees clockwise). How ...
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2answers
659 views

LSA-SAF data reprojection with GDAL and R

The Land Surface Analysis Satellite Applications Facility (LSA SAF) distributes several products derived from the EUMETSAT satellites data. I am working with R to read and process the data (the file ...
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1answer
43 views

Conversion of projection

I have received a drawing with a type of projection system which I do not recognize. The drawing says that it's LO 19/WGS 84. I would like to convert this to decimal degrees to be able to plot the ...
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0answers
48 views

Creating Proj4 string for local coordinates

I am fairly new to coordinate system conversion, so am rather lost on the following problem. We have been using Proj4 to convert between various coordinate systems which is fine for known coordinate ...
2
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1answer
79 views

Recommendation for getting TIF raster from modis HDF, for processing in R

I've downloaded a set of modis mod13q1 HDF files, e.g. MOD13Q1.A2016097.h11v05.006.2016114040325.hdf. I'd like to load the 250m_16_days_EVI and 250m_16_days_pixel_reliability bands into R as rasters. ...
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3answers
87 views

How I can reproject a wms service in openlayer3?

I was trying to reproject a wms service from EPSG:25830 to EPSG:3857, but it didn't work. I read that it is not possible to reproject a WMS, only a WFS, It is true? It is the code <!doctype html&...
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2answers
587 views

Project twitter geo data into WGS84 map

I'm currently working on displaying twitter geo data (currently just long/lat -> cartesian without any analysis). This is the world map (source: naturalearthdata): http://dl.dropbox.com/u/14747311/...
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How to do a custom, ad hoc, affine transformation?

I have a data set of unknown origin (probably CAD) and I have determined that the correct transformation for this data into the projection that I want is as follows: (4x + 2205432), (30y + 1254781) ...
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24 views

Creating a reference raster in R

I need to create global reference raster (100km grid, Eckert IV). Later, I will project other various rasters (with different resolutions and projections) into the resolution/projection of the ...
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42 views

Why reprojection GeoJSON with new.ol.View - not working?

I try to reproject GeoJSon file in OpenLayers 3 from : Geojson link With these JS in head : <script src="js/jquery-2.2.3.min.js" type="text/javascript"></script> <link rel="...
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2answers
206 views

projection differences in R

I am trying to reproject some climate data that I downloaded from http://gdo-dcp.ucllnl.org/downscaled_cmip_projections/dcpInterface.html#Welcomein The BCSD-CMIP5 data is found under the tab "...
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0answers
36 views

Rectangle shapefiles with the same extents does not align perfectly after projection

I have a rectangle shapefile built with UTM19 coordinates using a python script, and then projected to NAD83_CSRS (EPSG:4617). I have a second rectangle shapefile built with the same method (python ...
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10 views

Openlayers Reprojection from 4326 to 3395 is wrong?

I'm using proj4js definitions downloaded directly from epsg.io webpage. When trying to reproject a small extent I get this result: ol.proj.transformExtent([-180, -90, -179, -89], 'EPSG:4326', 'EPSG:...
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25 views

export WMTS tiles as MBTiles with reprojection

I need to export tiles from a WMTS server to the MBTiles format. The server is not public, but I have access to it and permission to export a specific portion of the tiles. The problem I have seems to ...
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1answer
22 views

Strange Custom Projection can't be transformed

I've got a a database of feature classes that were somehow transformed into a custom projection that I don't understand, and there does not seem to be a way to get back out of. The projection data ...
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1answer
98 views

Projection system differs

I want to define projection for a Shape file. The projection system is: "NAD_1983_StatePlane_Montana_FIPS_2500" which is referred in Qgis 1.9 as EPSG:102700. The same projection system is not ...
2
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0answers
15 views

units for gdalwrap output extent

I am attempting to write a small bash script that will mass process a large number of raster .tif files. It should do the following: Clip to a smaller extent Reproject to UTM This is what I have, ...
4
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3answers
152 views

Reproject raster with FME

I have multiple .tiff + .tfw files in EPSG:3067, which I need to reproject to EPSG:3878. I tried to do it with FME, and succeeded, kind of. The geotiffs are placed well, but some weird white area ...
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1answer
25 views

Combining data in two projections?

The PAMAP dataset comes divided between two different projections: Pennsylvania North State Plane and Pennsylvania South State Plane. I'd like a great big DEM of the whole state of Pennsylvania. ...
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2answers
422 views

How to reproject Geotiff correctly?

I am new for GIS programming. I try to change geotiff coordinate system from epsg 32635 to epsg 4326. I used the following gdal command: gdalwarp -rc -s_srs epsg:32635 -t_srs epsg:4326 -dstnodata 0 -...