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

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2
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1answer
52 views

Why I see a gap between ESRI Robinson WGS84 (EPSG 54030) VS QGIS Robinson WGS84 (EPSG 54030)?

Does anybody know why there a gap appearing between two point layers create with ESRI and QGIS when I a reproject, from the same source file, to Robinson ? The source coordinate system and ...
14
votes
1answer
9k views

Projecting sp objects in R

I have a number of shapefiles in different CRSs (mostly WGS84 lat/lon) that I'd like to transform into a common projection (likely Albers Equal Area Conic, but I may ask for help on choosing in ...
0
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0answers
21 views

Store WGS-84 degree decimal minute coordinates in postgis database [duplicate]

I have some data in a texfile where the coordinates are given in this format: lat lon 23S19.69 66W45.87 24S01.73 66W55.61 I already learned that it is some kind of WGS-84 with degree and ...
3
votes
1answer
26 views

Problem exporting registers with the land registry in DXF continuation (suite) in reprojection

I visualize (display) a municipality with the plugin register with the land registry in spatiality and in projection Lambert 93. I need the bottom on Autocad in projection CC47 thus I re-throw ...
1
vote
1answer
228 views

What projection to use with Mapbox base/reference layers?

excuse me if this has been asked before, but I can not find answer after heavy googling. What coordinate system/projection does shapefiles need to be in to be alligned correctly with mapbox reference ...
2
votes
1answer
600 views

Help converting projection/coordinates to Google Earth

I'm trying to program a GPS style tracker for a simulation game but I'm having a hard time figuring out how to transform the game's coordinates into Google Earth's. The game's world is flat and has ...
2
votes
1answer
237 views

How to reproject arbitrary coordinate system grid to OSGB using FME?

I have a polygon grid of a certain shape that has some data associated with it. Unfortunately its not properly projected, being in what seems to be an arbitrary scale and coordinate system (it was ...
2
votes
4answers
786 views

How to find and apply reprojection parameters?

I have a data set in one projection, and a shapefile in another, and I am trying to combine the two. I am using Python. I apologize for posting a "help me transform coordinates" question on this site ...
1
vote
1answer
268 views

Conversion of EPSG:3857 coordinate to UTM

I'm trying to convert coordinates from Google Maps using the PostGIS. I'm using this query: SELECT ST_AsText(ST_Transform(ST_GeomFromText('POINT(-29.16297 -51.1795034)', 900913), 29182)); The ...
3
votes
1answer
38 views

Averaging Cartesian ECEF coordinates then converting to WGS84 without latitude drift

Preface: I'm unsure if GIS or math is the correct community for this question. I have a set of 9 WGS84 latitude/longitude (degree) pairs for which I need to find the weighted average of. To prevent ...
0
votes
2answers
273 views

projection conversion from mercator to google maps format

Is this spTransform(Finland3, CRS("+proj=longlat +ellps=WGS84 +no_defs+ellps=WGS84 +towgs84=0,0,0 ")) the right way to project a shapefile with this projection coord. ref. : +proj=merc +lon_0=0 ...
4
votes
1answer
56 views

How to center a user-defined CRS on an area of interest?

My study extent in central Iran straddles two UTM zones (39 and 40): I would like to create a user-defined CRS in Transverse Mercator projection with central meridian inside this area. Through ...
1
vote
1answer
44 views

Simple way to plot netCDF variables on Mollweide projection in R

After spending hours Googling I'm still no closer. I'm very keen to find out if there is a very simple way to plot up variables from a netCDF file that are stored in a regular lat-lon grid (-90to90˚N, ...
2
votes
1answer
34 views

QGIS Reprojecting csv point file to projected CRS

This is a problem I have been struggling with quite a bit and so far have not found a good solution, so I hope to find some help here or an eyeopener where I have gone wrong so far. Using QGIS 2.10.1 ...
2
votes
1answer
22 views

Wedge of missing data reprojecting to stereographic

I am trying to reproject an equirectangular projection image into stereographic around the north pole of mars using gdalwarp and I am not sure what is happening in my output image. The input image ...
0
votes
1answer
30 views

OpenLayers tiles from reprojected mapdata mixes zoom levels

We have a map tile layer on OpenLayers where original projection is EPSG:3067 and it is reprojected to EPSG:3395 projection. The map is coming there quite ok, it has not the tiles as straight squares, ...
0
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2answers
31 views

How to define a 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 ...
2
votes
1answer
64 views

Converting Lambert Conformal Conic (LCC) to UTM

I have two numpy meshgrids (X, Y both 2D) in Lambert Conformal conic with the following information: I'd like to directly (or indirectly if not possible) project them to UTM. I have both pyproj and ...
0
votes
0answers
30 views

Projection Transformation from ETRS89 LAEA to WGS1984

I am having difficulties to transform a Shapefile in ArcGIS 10 from ETRS 1989 LAEA to WGS 1984 N33. I have 2 files: a) in WGS1984 N33, with a grid of 10x10km, b) in ETRS 1989 LAEA, with small ...
9
votes
2answers
204 views

Why do I get correct area and intersect area when use wrong projection?

I need to calculate areas and intersection areas for polygons (some real geographical objects like lake, city, country, e.t.c.). Polygons located in California, New Zealand, Russia.Anadyr, Sweden All ...
0
votes
1answer
338 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
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2answers
959 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 ...
0
votes
1answer
19 views

Is it possible to project an ArcGISDynamicMapServiceLayer using the JS API?

I need to project some dynamic layers to Web Mercator. The geometry service only projects geometries. Is there a geo-processing tool in ArcMap for this? Or any suggestions how i could do this without ...
1
vote
1answer
59 views

Converting from kilometers to degrees distances?

We have geometries in a Postgis database with SRID WGS84 and we have found lookups directly in degrees to be much faster than in kilometres, because the database can skip the projections I would ...
0
votes
1answer
36 views

How add a text field and then reproject all shapefiles which are in sub folders

I have a folder and inside of that folder, I have about 500 sub folders which contain on average about 5 shapefiles each. What I want to do is: to check if there is a field, lets say field_1, and ...
1
vote
1answer
203 views

How to reproject from Clarke_1880_RGS_Lambert_Conformal_Conic to ETRS_1989_LAEA?

I am unable to reproject Marseille shapefiles from Clarke 1880 RGS_Lambert_Conformal_Conic to ETRS_1989_LAEA. I know that Clarke is a geographic coordinate system and it has no datum. I have tried ...
0
votes
1answer
19 views

How to project from Greek Grid to ETRS LAEA

How to make a project transformation between Greek Grid (EPSG:2100) to ETRS LAEA L52_M10? I'm using ArcGis 9.3.1, but when I use the project tool, it don't have anything in "Geographic ...
0
votes
1answer
26 views

Autocomplete “select” not centering on map

Everything seems to be working good until I select from the list of names. The map isn't centering on the proper coordinates. I'm using Jquery UI and and openlayers 3. here's my code: $(function ...
1
vote
1answer
1k 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
votes
3answers
290 views

How are ESRI WKT projections different from OGC WKT projections?

Does anyone know the precise list of differences between esri wkt and ogc wkt projection format strings? I know there are various tools to help convert from esri wkt to ogc wkt, incl gdal utilities ...
16
votes
2answers
12k views

What is the difference between EPSG:900913 and EPSG:3857?

I'm using the QGIS google layers plugin to digitize a parcel as a shapefile. Later I want to import it to PostGIS. I know that google maps use a special 'google mercator' projection. What is the ...
0
votes
2answers
426 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) { ...
0
votes
0answers
29 views

GDALwarp: Re-projecting from EPSG<4326> to EPSG<3857>; problem: “double pixels”

I would like to change the projection from a png file that shows river pixels that exceed a certain threshold. Therefore I am following this workflow: (note: it is part of a larger R script) 1) ...
1
vote
1answer
61 views

Convert distance from meters to EPSG 3857

I need to convert distance from meters to units of EPSG 3857 in PostGIS. This is important for me to calculate a radius for ST_DWITHIN as I'm dealing with geometries. How can I do this?
2
votes
1answer
27 views

OTF reprojection and reprojecting layer not working in QGIS

more troubles in QGIS. I georeferenced this raster in Corrego Alegre UTM23S and loaded up, so project CRS automatically changed to that. So far so good. I need it to be however in WGS84 UTM 23S. None ...
0
votes
1answer
420 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 ...
3
votes
2answers
3k views

How to convert 6 & 7 digit coordinates to degrees latitude & longitude

I'm a bit new to the whole GIS world, and though I am making great headway drawing polygons and such in Bing Maps, I am currently stuck. In our SQL spatial data, I came across MULTIPOLYGON data, where ...
2
votes
3answers
125 views

How to project a layer from WGS84 lat/long (automatic projection) to WGS 84 UTM Zone 23S in QGIS?

So I have a vector layer of polygons in WGS 84 lat/long (i.e. using the automatic projection for lat/long and WGS84 datum). I want to change that to WGS84 UTM 23S in QGIS. I tried doing like online ...
2
votes
1answer
97 views

Reprojecting MODIS Sea Ice Extent and IST data using GDAL

This is an additional exploration of the problem described at Reprojecting MODIS Ice Sea Temperature products with gdalwarp which was never answered in a satisfying way (I apologise for the length of ...
0
votes
0answers
18 views

Defining Projection of Shapefile Didn't Align With Basemap, EPA Ecoregions [duplicate]

I'm using ArcMap 10.2 on a Windows 10 PC. I tried defining the projection of the ecoregions of Alabama and Georgia shape file (USA Contiguous Albers Equal Area Conic USGS version) to my basemap (GCS ...
1
vote
1answer
43 views

Transforming coordinate in the Swiss reference system LV95 into LatLong/WGS84

I would like to transform coordinates expressed in the Swiss reference system LV95 into LatLong/WGS84. On the website of the Swiss topography centre, there is an application to do so, however ...
0
votes
1answer
60 views

Geoserver renders reprojected raster only as transparent images

Trying to reproject WMS layers in geoserver from the default of EPSG:4326 to EPSG:3574 Using the default projection works fine. url = ...
0
votes
2answers
45 views

Why do my raster pixels not align?

I am working in ArcMap 10.2.2. I am trying to project a NED 3m dataset from a Geographic Coordinate System to a Projected Coordinate System. The output rasters pixels do not overlap the original ...
1
vote
1answer
70 views

Strange effect in gdalwarp output

I am using gdalwarp in python to extract and re-project reflectance bands from MODIS level 1B (MOD021km). An example of the command that I am using is the following: gdalwarp -of GTIFF -tps -t_srs ...
1
vote
1answer
166 views

Transforming x/y co-ordinates of 'custom' map to 'real' long/lat co-ordinates?

I have in front of me a 'custom' map of an area I like to visit. It's just a representation of the area, so there's no real connection between the points on the 'custom' map (a) and how they would ...
1
vote
1answer
69 views

Conversion of (lat, lon, height) from GPS to another CRS

I have latitudes, longitudes and ellipsoidal heights derived from GPS readings, referenced to the ITRF08 system with vertical datum (CGVD2013) - http://webapp.geod.nrcan.gc.ca/geod/hmod/hmod.php How ...
0
votes
0answers
32 views

Coordinate Transformation Issues

We are a GIS department using ArcDesktop and SDE 10.3. We are receiving service requests through a 3rd party web application (seeclickfix) that records the service request in WGS 84 lat/long. The ...
2
votes
1answer
48 views

Conversion of 3 degree UTM zone Easting Northing to WGS-84

In Nepal we use 3 degrees width zone UTM with 3 central meridians 81 E, 84 E and 87 E and datum: Everest-1830. I am trying to convert the Everest-projected coordinates to WGS-84's Latitude and ...
3
votes
1answer
95 views

Difference between gdalwarp and projectRaster

I am trying to project a Raster. In R there is the projectRaster() function to to this (below a fully reproducibly example) : # example Raster require(raster) r <- raster(xmn=-110, xmx=-90, ...
0
votes
0answers
23 views

Openlayers-3 setCenter is not working

I'm trying to set the center (setCenter) of the map from a JSON coordinate that comes in form Genomes using ui.autocomplete. I'm using the openlayers default proj of EPSG:3857, so to get the ...