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

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19 views

How to remove projection in terminal from .shp file with valid .prj available

I have .prj, .shp, .sbn, .sbx, .shx, .dbf files where the content of the .prj file is the following: ...
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29 views

Change raster projection in R

I'm trying to change raster projection using R and its raster library. The input raster projection is Lambert Azimuthal; this one and other params can be seen here: ...
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35 views

Why is the project tool in ArcGIS (ArcMap) for desktop throwing the “invalid geographic transformation” error?

I'm trying to reproject a point shapefile from ITRF92 to WGS84 UTM ZONE 14 NORTH. On the geographic transformation input field, I copied and pasted the following geographic transformations from the ...
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1answer
20 views

Difference in EPSG:28992 (RD/Amersfoort) definitions

I need to do some projections between WGS84 (EPSG:4326) and the Dutch RD system (EPSG:28992) in JavaScript. I use Proj4js for this. When adding the definition from spatialreference.org I noticed a ...
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3answers
356 views

Does transforming to a new projection, then back, affect data accuracy?

I have a feature class (South Carolina counties, so a fairly large geographic area) in NAD83 SC State Plane. It needs to be transformed to a second projection (NAD83 UTM 17), then transformed back to ...
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1answer
26 views

Arcobjects Assign projection transformation to layer file in VB.net

I want to be able to transform a layer from WGS1984 to OSGB1936. I created a tool that extracts layers from several folders on our company network folders, using check boxes that user clicks. One of ...
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11 views

MapProxy with WMTS source and reprojection

I am trying to consume Lantmateriet's WMTS source with EPSG:3006 and convert that to iOS TileOverlay compatible (GoogleMaps compatible) tile server. I cannot get it working. Can someone check this out ...
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2answers
52 views

TileStache Vector Tiles Overlay problem

I am using TileStache to serve my own vector tiles using a postgis datasource. First I re-projected the shapefiles I had using ArcMap ( reprojected to Web Mercator (Auxilary Sphere)) and loaded them ...
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2answers
26 views

How to convert bbox when importing GeoTIFF with Geotools?

Here is my code: String EPSG4326 = "GEOGCS[\"WGS 84\",DATUM[\"WGS_1984\",SPHEROID[\"WGS ...
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1answer
17 views

Plot image on map based on corner coordinates

I have a color image and I know geographic coordinates of its 4 corners. Now I'd like to place this image on basemap in GMT using any projection. Any idea how to do that?
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2answers
46 views

How to re-project a shapefile to be compatible with another shapefile or raster?

I have a polygon shapefile and a raster. The shapefile and raster have different coordinate systems. Coordinate System for the shapefile: NAD_1983_UTM_Zone_19N WKID: 26919 Authority: EPSG ...
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34 views

How to unproject a UTM ESRI Shapefile over WGS84 extent boundaries

Background: I am working on a collaborative project in Python that uses GDAL/OGR to work with rasters and vectors. There is one function that attempts to project one ESRI Shapefile's coordinate ...
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1answer
27 views

How to describe a MODIS Tile's distortion

When looking at the MODIS grid [1] and compare it to how the sinusoidal projection is distorted, I wonder how to both practically and formally describe the distortion factor for each MODIS grid tile. ...
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1answer
27 views

Defining the correct AEA proj4string for FEWSnet Rainfall Data (Southern Africa) in R [closed]

I have some general questions about how to go about solving this problem: I am trying to incorporate FEWSnet's monthly Rainfall Estimate data from 2014-2015 for Southern Africa into an analysis where ...
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1answer
45 views

Reprojection issue from WGS84 to UTM32

In QGIS I want to transform a point shapefile from WGS84 to UTM32 (EPSG:4647). The result moves the point from somewhere in Norway to a position off the coast of Congo, Africa. Can anyone explain ...
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2answers
55 views

Inferring lat/lon based on known location coordinates

I have a point dataset with a set of coordinates that is in an unknown projection. For some of these points I know the unprojected latitude and longitude. Based on these known data points, would it be ...
3
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1answer
21 views

'Fix' offset and undersized data in QGIS

I'm currently working on a project to visualize some climate data, among the datasets I'm using is the data from the NCEP/NCAR Reanalysis Project. Now, this data comes in a regular (non-gaussian) ...
4
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2answers
89 views

ogr2ogr of NTF_Lambert_II_etendu is off by about 30 meters

I am converting RPG files in NTF_Lambert_II_etendu to wgs_84 using: ogr2ogr -t_srs EPSG:4326 ilot_2008_027_wgs84_2.shp ilot_2008_027.shp but the result is off by about 30 meters. Surprisingly, the ...
3
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2answers
73 views

What is a suitable map projection for the entire state of Idaho?

I am working with some sample GIS data for Idaho. The data is in geographic coordinates but I want it in projected coordinates. I am unsure how to address the issue of projection as Idaho crosses ...
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1answer
43 views

How to use Prolong Line feature with an input layer in WGS84?

I have a source point table in SRID:4326, and to make it look geographically accurate, I project my project file to SRID:2877 (State Plane CO) (layer still reports source CRS of SRID:4326). In order ...
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0answers
27 views

Retaining resolution of MODIS data while reprojecting using gdalwarp

Can anyone help me to use gdal(gdalwarp specifically) for reprojection? I am using it to reproject MODIS data : I originally have an hdf file - MCD43A4.A2005001.h08v05.005.2007351192333.hdf which has ...
2
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0answers
69 views

In R: Convert from WGS84 lat/long to UTM and back again to WGS84 lat/long

I am looking for a way in R to project WGS84 latitudes and longitudes to a UTM grid and then convert the UTM coordinates back to the WGS84 latitudes and longitudes. I have found a number of ways to ...
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0answers
33 views

Projecting GeoJSON polygon object in python to calculate area

I have a script, written in python, that does many calculations - but one set of calculations hinges on determining the area of a polygon that I read in, in GeoJSON format. I can convert this object ...
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1answer
81 views

Do I need to reproject a NAD83 raster (with no projection) before using it with a shapefile that has a specific NAD83 projection?

I am relatively new to using ArcMap, so I apologize for what I guess is a relatively easy question. I working with a gridded PRISM precipitation raster (www.prism.oregonstate.edu), which has a ...
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2answers
45 views

Displace Lat/Long by meters

Sorry for the inflammatory title, Yes, I know these cannot be added. Problem: I have a vehicle that is reporting LL84, coordinates. It has a sensor that reports footprints of obstacles (LineString, ...
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22 views

Creating Projection/Datum TransvMerc/OrdSurvGrtBrit in QGIS?

I have Memory Map files QCT exported to ECW. The Projection/Datum is Transverse Mercator / Ordnance Survey Great Britain which is not mentioned in the list of Projections/Datums available. How can I ...
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1answer
23 views

Project to NAD83 (epsg:26912) with projectRaster - gives epsg:2152

I am working with some Landsat 8 images from the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center. I am processing the images in R, and after masking the clouds, I ...
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1answer
60 views

How to make two layers with different CRS line up correctly?

I have an Excel Table with Lat/Long information. Its lat/long of this coordinate System: UTM zone 29n My population density map instead is this coordinate system: UTM WGS84 Example: Barcleyville: ...
2
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1answer
69 views

Using Proj.4/GDAL to convert lat,lon to i,j

I'm working with a data set in GRIB2 format and need to determine the grid cell index (i, j) corresponding to a given lat,lon. I have the projection definition in the form of projparams as follows: ...
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3answers
47 views

Converting GeoTIFF projection definition to proj4

I'm working with las/laz files which often have GeoTIFF information attached to them. However, for further processing I need proj4 definitions. http://spatialreference.org/ has helped me so far to ...
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22 views

Building proj/pyproj projection string for local coordinate system?

I'm struggling to come up with a proj string for a local county coordinate system using pyproj. The system is defined as follows: Linear unit: International foot (ift) Geodetic datum: North ...
2
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1answer
36 views

gdalwarp leaves big hole at 180° longitude when warping from 4326 to custom AEqD

I'm trying to reproject the Natural Earth I 1:50m raster into an Azimuthal Equidistant projection centered on my hometown. As you may know, the source raster covers from -180° to 180° latitude, and ...
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0answers
43 views

gdalwarp UTM Zone 1 to WGS84 - fails to transform

I have a global dataset consisting of tiles in UTM projection that I want to mosaic and therefore need to reproject to a common projection. Can I solve my reprojection error with options to gdalwarp ...
1
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1answer
54 views

Converting x,y on mercator to WGS84 latitude and longitude

How do I convert a particular point on a Mercator map (points in a Mercator map svg) to WGS84 coordinates? Is it simply a direct translation of the x,y values, using a multiplier which matches the map ...
3
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1answer
74 views

Is re-projection needed from SRID 4326 (WGS 84) to 4269 (NAD 83)SRID

I have US census data against state boundaries stored as SRID 4269, in an MSSQL DB. The input data used for calculations against that dataset is stored as SRID 4326. As far as I can infer from the ...
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0answers
9 views

StreetDirectory API: metricToGeo returns undefined

I am currently implementing the SD API and am trying to convert their x and y coordinates into lat and long. I only need the static values and this is how I implement it: <script ...
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0answers
52 views

Reprojecting MODIS NDVI and reading the hdf output file in ENVI

I'm working with ENVI5.3 and want to open a MODIS NDVI (MOD13Q1) in hdf format. Firstly, I used the Modis Reprojeciton Tool to reproject the modis tile. And I opened the reprojected file in hdf format ...
0
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1answer
188 views

Transforming coordinates from WGS84 to Gauss-Krüger 5

GPS coordinates in the format of WGS84 are quite common. I need to transform them into Gauss-Krüger coordinates but I have no idea how to do that. The only things I know are that it is not easy and I ...
0
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1answer
37 views

Selecting one subdataset when using ModelBuilder in ArcMap for reprojection

I'm trying to reproject roughly 500 MODIS images (MOD09GQ) into an Equal Areas Projection. I've been informed that ModelBuilder would be the best way to do this. However, when I set up my model and ...
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0answers
37 views

How to test polar stereographic projection for a specific longitude intersection?

I'm writing a library that tests grids defined by map projections for intersections, and am running into an issue implementing the test for polar stereographic and rectangular projections - ...
0
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0answers
54 views

How to measure nearest neighbor in miles or kilometers between two point layers using QGIS?

I have tried to look for an answer to this question, but cannot find an adequate solution. I have two point layers. One is of locations by lat/longs of homes in Louisiana. The other is a layer of ...
1
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1answer
51 views

ArcGis tiles on OpenLayers are very blurry

I'm trying to get this map on my openlayers map When I just add the layer in the code below, I do get the tiles, correctly referenced, but very blurry. var url = ...
0
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0answers
39 views

How to use Esri custom geographic transformation in FME Desktop 2015 Workbench?

I am trying to reproject DWG files from one projection system to other using a custom transformation created by me with ArcGIS. When I execute it reprojects the data but does not use the custom ...
2
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1answer
25 views

Defining output raster type in ModelBuilder?

Im trying to reproject raster data type .jpg inside a model builder, i batched the model, everything is ok besides that the raster type after that is in .tiff by default. I want those to stay in .jpg
3
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1answer
25 views

Reproject and cache a tile service

We have a legacy tile server with tiles georeferenced to EPSG:4326 accessed as follows through openlayers:- var OLDSERVICE = new ol.layer.Tile({ title: 'OLD SERVICE', ...
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1answer
90 views

On the fly reprojection in QGIS?

I'm new to QGIS and trying to deal with on the fly reprojection. I have three layers : a shapefile in EPSG:4326 a raster in EPSG:3395 that same raster reprojected in EPSG:3857 (with QGIS via the ...
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2answers
67 views

Coordinates transformation

I have the following data base with information about rainfall for a set of meteorological stations: year station latitude longitude depto municipio date rainfall 1990 11010010 0527 N ...
2
votes
2answers
102 views

projection conversion from local to UTM

I have some images at a local coordinate system with the following specifications: TIFF header file: -gdalinfo im.tif Driver: GTiff/GeoTIFF Coordinate System is: PROJCS["Eastern Ridge Project Grid ...
0
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1answer
43 views

Offset after projection from WGS84 to ETRS1989

I'm using ArcMap 10.3, my dataframes coordinate system is "ETRS_1989_UTM_Zone_32N_6Stellen". I have several shapefiles in my project which are using the WGS84 system. When I try to proct them to ...
2
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0answers
106 views

Problem reprojecting LiDAR data using liblas

I have multiple lidar data sets and I am trying to reproject them using liblas. They are missing the coordinate system in the header information so I assign them an SRS using las2las --a_srs: las2las ...