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

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3
votes
1answer
23 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 ...
4
votes
1answer
38 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 ...
2
votes
1answer
29 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 ...
0
votes
2answers
26 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
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, ...
2
votes
1answer
62 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
26 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
200 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
18 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
52 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 ...
1
vote
1answer
40 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, ...
0
votes
1answer
35 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 ...
0
votes
1answer
17 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
0answers
27 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) ...
2
votes
1answer
25 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 ...
1
vote
1answer
57 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?
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 ...
2
votes
3answers
115 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 ...
0
votes
1answer
54 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
42 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 ...
2
votes
1answer
95 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
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 ...
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 ...
2
votes
1answer
44 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 ...
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 ...
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 ...
1
vote
1answer
67 views

How to Install GDAL with ECW Support on Windows

What do I download from http://www.gisinternals.com/stable.php for Win7-32 to cut 1:1M map sheets out of Australia.ecw file in GDA94/Geographic and save them as geotiff in WGS84/Geographic? I would ...
3
votes
1answer
93 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, ...
1
vote
0answers
30 views

C++ Convert Lat Long to BNG with Proj.4

Im creating a plugin for VBS2. In the program I can output a grid in either LAT LONG,UTM or MGRS. I need to be able to convert to BNG. I have managed to create a TKinter application in python that ...
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
29 views

XML Document points to the wrong location after using arcpy.BatchProject()

I'm trying to reproject a number of shapefiles representing contours from NAD_83_Albers to NAD_83_UTM_Zone_9N using arcpy.BatchProject(), but I have to use python/regex to preserve a particular file ...
0
votes
1answer
54 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 ...
2
votes
1answer
85 views

WGS84 conversion to EPSG:3067

I'm trying to convert coordinates from WGS84 to EPSG:3067 with proj4js and Openlayers, but can't get the conversion right. When I run proj4('EPSG:3067',[-24.9993393, -60.184716]); it gives ...
0
votes
0answers
42 views

Reprojecting in Postgis

I try to reproject a layer in PosGIS using statement: UPDATE <table> SET geom=ST_Transform(geom, 3857); leading to error message: ERROR: transform: couldn't project point (574415 6.22508e+006 ...
-1
votes
1answer
141 views

Convert xy coordinates to latitude & longitude

Is there an easy way to convert coordinates (TM65) to latitude/longitude using ArcMap (version 10.3.1)?
1
vote
1answer
29 views

Spatial Resolution Reprojection - rom Angular to Rectangular Values with GDAL?

I have an image in a WGS 84 / No Defs projection. I can get it spatial resolutions in angular units for X axis and Y axis through geotransform parameters. If I would reproject this image into WGS 84 ...
1
vote
0answers
27 views

Projections way off on data imported into QGIS?

I have elevation data as a .shp from the USDA ARS and Hi-Res Orthoimages (Mystery Projection (UTM 15N?)) from the USGS website as geoTIFFs (plain NAD 83). I am trying to project all of the images ...
0
votes
0answers
33 views

Converting NAD 83 to WGS 84 in PostGIS

My question is about the best way to convert from NAD 83 to WGS 84 in PostGIS. I have a PostGIS DB containing National Elevation Data rasters. The rasters are in NAD 83 and I would like to convert ...
1
vote
0answers
74 views

extract x-y from a point created from lat/lon coordinate

Using QGIS 2.8.1, how can you create a point in WGS 84 using a lat/lon and extract X and Y value of this same point in CRS UTM34N. For eg, you have been given a lat 20 deg and lon 50 deg. Create a ...
3
votes
3answers
64 views

Lines on reprojected sp objects with Mollweide projection

I'm having an odd problem such that when I reproject maps to a Mollweide projection in R using sp, I get additional lines stretching across the globe. What is going on here, and do you have any ...
1
vote
2answers
24 views

Pacific NW Projection Issues

The basic issue is that I have shapefiles saved in WGS84/Pseudo Mercator (EPSG: 3857) and some DEM data saved in NAD83/UTM Zone 10N (ESPG: 26910), but can't get them to line up. I'm using QGIS and ...
2
votes
2answers
17 views

Selecting the correct projection for NAD_1983_HARN_WISCRS_Bayfield_County_Feet

I am trying to map the following projection but having issues finding a one that works. I ahve used http://prj2epsg.org/search which gives a few results but none seem to work that well. ...
0
votes
0answers
13 views

Projecting DSM, doesn't match with vector layer

I have a dataset that includes a DTM, DSM and a shapefile (all projected in WGS84, but all of them are likely coming from ED50_UTM33N.) Those files should line up but don't. The shapefile lines up ...
0
votes
1answer
32 views

error: 'Cannot read property 'divideBy' of undefined', L.Proj with esri.leaflet

I am trying my first attempt at adding an (in-house published) ArcGIS basemap to a Leaflet based web application, using Proj4Leaflet and esri-leaflet. Here is my js: var crs = new L.Proj.CRS('EPSG: ...
0
votes
1answer
38 views

Reprojecting MODIS MCD64A1 to WGS 1984?

I am part of the technical team of the Autoridad de Fiscalización y Control Social de Bosques y Tierras of the Estado Plurinacional de Bolivia , and we are conducting a multi-temporal study of the ...
2
votes
1answer
154 views

Properly Converting from UTM to Lat/Long with gdalwarp

I have a file in GeoTiff format in UTM coordinates. I convert the file to LatLong, then back to UTM, and the coordinates aren't what I started with. I have the printout of the process below. ...
1
vote
2answers
103 views

Using Geotools: How to convert these strange coordinates from a shapefile into regular lat and long?

I use this dataset from the European Union: http://www.eea.europa.eu/data-and-maps/data/administrative-land-accounting-units Opening the shapefile with Java' Geotools, I see coordinates like: ...
1
vote
1answer
233 views

Converting Long/Lat into X/Y in the same coordinate system

I have a text file with two fields including Longitude and Latitude in degrees. I need to convert this into two fields that contain these values in X and Y. The source and destination coordinate ...
0
votes
0answers
26 views

Are there standard math formulas for esoteric map projections (like Dymaxiom)?

I come from graphics programming, I have been mucking about making map apps with more interests in map projections. I have a simple 2D tile map, but I'd like to convert that to some of the more ...