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

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Gdal: How to reproject from equirectangular to mercator?

I work with raster ETOPO1, made a crop of my area of interest. curl -L -C - ...
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36 views

ogr2ogr reprojection works on command line but shifts output when same command run from inside python?

Reprojection with ogr2ogr works fine on command line, but shifts the polygon to northeast when same command is run from inside python using os.system(...) Any ideas why this could be? I hard-coded ...
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21 views

Colour issue when reprojecting image mosaic

We have a couple of instances of GeoServer running, one of which is the latest version and the other is version 2.1.3. The older version has Ordnance Survey base mapping which is loaded as a number ...
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92 views

Reprojecting Natural Earth raster into natearth projection with gdalwarp causing black squares?

I'm trying to reproject the Natural Earth 2 raster layer (http://www.naturalearthdata.com/downloads/10m-raster-data/10m-natural-earth-2/) into the natural earth projection ...
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25 views

Lambert_Conformal_Conic: converting from shapefile to geojson fails

I have a shapefile that also contains a proj file that looks like so: PROJCS [ "MGI_Austria_Lambert", GEOGCS [ "GCS_MGI", DATUM [ "D_MGI", ...
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27 views

Converting WGS84 points to a 2D x,y point (plotting)

I have been trying to convert the WGS84 style geo-positions to x,y coordinates on a 2D plane. I have looked into many different links, websites, studies and I honestly gave up on finding a plane copy ...
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47 views

Help projecting Austria data with QGIS

I'm trying to reproject this dataset from Austria Statistik Geodata. Data comes in "MGI_Austria_Lambert", and I'm trying to reproject to WGS84 What I'm doing is Saving layer as... and selecting ...
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64 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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64 views

Pyproj: converting WGS84 to Robinson

I have a WGS84 coordinate pair (37.7749295, -122.4194155). I have an image that is a Robinson Map Projection of the world. I'm trying to write a python script to locate my WGS84 coordinate on my ...
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53 views

Coordinate conversion (EPSG:3857 to EPSG:4326) using OpenGIS/JTS too slow

I am using the Java based libraries of OpenGIS and JTS to convert coordinates from EPSG:3857 to EPSG:4326 to proceed to compute the distance using the Haversine formula. The distance features in a ...
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70 views

Converting from different projections to WGS84 Web Mercator Auxillary Sphere

I have multiple datasets in my ArcGIS, each having different map projections. All of them are vectors. Some are using Sphere Mercator, others using WGS84. I cannot perform the reprojection function in ...
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29 views

Vector seems to be only a pixel of a raster after reprojection

I have the South America hydro1k data for slopes and I am trying to extract the data using point sampling tool with a grid in Brazil's map. My problem is that, even though vector and raster seem to ...
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67 views

How do I convert Geo-Coordinates to Pixel-Coordinates on a Map?

I have an image file that is a Robinson Projection Map of the world. I have a list of geo-coordinates. I would like to find the pixel-coordinates on the map that correspond to my the geo-coordinates I ...
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1answer
32 views

QGIS: Plot a layer given with Longitudes [0 360] to [-180 180]

I have a world map in correct Longitudes from -180° to 180°. Additionally, I have a shapefile of data from South America, which shows at 290° instead of -70°. How can I reproject it using QGIS?
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19 views

What projection system is used in China which is aligned with WGS84

I have some GPS tracks in Beijing. I want to project it and convert the lat long degree values in meters for calculation in euclidian space. I was wondering what is the most suitable coordinate and ...
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1answer
37 views

Coordinate System changes after reprojection

I have changed the projections of some Natural Earth Shapefile to "WGS 84/Pseduo Mercator", that works fine (after cutting out the artic), but now the co ordinates of the shapefile are all out of ...
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26 views

Projecting INEGI shapefiles from Mexico - not lining up [duplicate]

I have two INEGI shapefiles from Mexico (2000 and 2010) that I want to line up with one another. The 2010 file projects in the right location and I would like the 2000 file to match/line up with the ...
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35 views

What C/C++ libraries exist to transform vectors between map projections

Has anybody written a C/C++ library (preferably one that is aware of Proj.4 definition strings) that has a set of routines to convert vector quantities (e.g., wind speed and direction) between map ...
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37 views

Creating a marker proportionally offset along a line in QGIS 2.4 when re-projecting

One of the nice new features in QGIS 2.4 is to be able to offset markers (e.g. arrow heads) along a line as part of the styling. I am trying to display a dataset of simple lines (not polylines) with ...
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1answer
36 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 ...
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1answer
49 views

Projecting INEGI shapefiles from Mexico

I have two INEGI files from Mexico (1990 and 2010) that I want to use the same projection. The 2010 file works fine (see below) and I would like the 1990 file to match the 2010 one. The shapefiles are ...
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32 views

Holes between imagery tiles projected using gdalwarp

I am having the following issue when reprojecting imagery tiles using gdalwarp. These are 4096x4096 imagery tiles, which I'm gdalwarp'ing from WGS84 to a State Plane projection. When reprojected, ...
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20 views

Misalignement of the Corine data set after reprojection with gdalwarp, nodata not working either

I want to reproject the original corine data set with a resolution of 100x100m. I am using gdalwarp: $ gdalwarp -overwrite -s_srs EPSG:3035 -t_srs EPSG:32632 -tr 100 100 -tap -wo "SAMPLE_GRID=YES" ...
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34 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). Would really appreciate some ...
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46 views

Why can't I reproject from HARN State Plane Ft Intl to State Plane Ft?

I'm attempting to reproject a feature class that is: NAD_1983_HARN_StatePlane_Oregon_North_FIPS_3601_Feet_Intl to our standard, which is: NAD_1983_StatePlane_Oregon_North_FIPS_3601_Feet When I ...
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1answer
29 views

Raster projection fails without error

I have a raster in one coordinate system (SC State Plane NAD83 NSRS2007) and need to project it to another (SC State Plane NAD83 HARN). When I run Project Raster, it fails silently: the dialog box ...
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32 views

Geodjango transform introduces large errors

Apologies for the possibly naive question. I'm trying to understand how Geodjango (running on PostGIS) deals with coordinate transformations, and am experiencing some unusual behaviour. Let's say I ...
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71 views

QGIS to solve projection mystery in Postgresql

I downloaded some data from local agency. Per QGIS 2.2, I defined the projection to 'EPSG:3587 - NAD83(NSRS2007) / Michigan Central' in postgresql (maybe ArcMap). Data is in Postgresql 9.3. I am ...
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102 views

distance difference in Google Earth with exported GPX or KML compared to source shapefile

I've converted a shapefile (points) to KML with QGIS. Points in the shapefile are within 100m distance from each other. When I measure it in Google Earth, the distance changes to 80m. The same ...
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55 views

Conversion problem of projection of MODIS LAI from sinusoidal to geographic

I am trying to change MODIS data's (LAI) sinusoidal projection to geographic. Actually I did it. But when I reproject it by ERDAS, the output LAI raster moved about 10 km to west side of actual shape ...
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1answer
62 views

How to convert to web mercator projection using an open source tool?

I've got a KML file which I need converted to a web mercator projection. This file will go into Tilemill. What are some good open source tools to convert files to the web mercator projection?
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57 views

How do I convert to EPSG:3857 with GDAL?

I have some TIFs in EPSG4326 the GeoTiff info looks like: GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223563, AUTHORITY["EPSG","7030"]], ...
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22 views

Changing original source projection

I am attempting to match up 2 raster layers, both a OS survey map and some independent survey data. The map I know to be in the correct position, However the survey data shows a layer extent of (layer ...
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1answer
69 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 ...
2
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1answer
116 views

Wrong projection high quality shapefile for the coastline of Helsinki region (Finland)

I did some spatial interpolations in R and I need a support for those. Looking for shapefiles online the best I could find was and it looks really horrible, the same area in ggplot looks like . I ...
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2answers
54 views

OpenStreetMap Tile Server with Custom Projection Systems

I am trying to install the OSM tile server on a local machine with a custom projection system like epsg:3573. For the server installation I followed this tutorial ...
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1answer
56 views

Map project a raster having separate latitude and longitude raster bands

I have a satellite image where one of the channels is a raster having the longitude values, another channel a raster containing the latitude values. What would be the best way for map projecting such ...
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1answer
67 views

Reproject WKT Polygon with Javascript

I have a polygon in WKT in EPSG:4326: polygonWKT = 'POLYGON((13.215179443359373 52.588032137196755,13.42803955078125 52.592620721000365,13.454132080078125 52.46897854656702,13.347015380859375 ...
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3answers
92 views

How to measure areas using an official CRS which is not available in QGIS?

I am very new to QGIS and doing a project on Glacial Lake Outburst & Flooding (GLOF). I am trying to find the area of a lake using images from Google Earth 7.0.3.8542. I am using the WGS84 CRS ...
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2answers
60 views

Any difference between EPSG:3003 and EPSG:102091?

I am working on QGIS 2.2.0. The PRS I am working on is Monte Mario / Italy zone 1 (EPSG:3003), with the following parameters: PROJCS["Monte Mario / Italy zone 1", GEOGCS["Monte Mario", ...
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1answer
30 views

Project one layer in qgis using projection CRS of another layer

I am using QGIS 1.6 and have imported a set of latitude, longitude points from a csv file as a layer. I also have another layer from a shape file. When I go to layer->properties for the second layer I ...
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1answer
69 views

Fix Black Border in Python Batch Raster Conversion

I have a Raster image like this as you can see the road are not connected between 2 raster (up and down) its because the scanned raster use different projection (dgn utm 50s) than my data frame (utm ...
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2answers
117 views

Changing layer extent to decimal degrees?

Using ArcMap or ArcGIS 10 ... In the photo below, you can see my extent is in meters while my projected coordinate system is in decimal degrees. How can I convert my layer extent to decimal degrees? ...
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43 views

Batch raster conversion

I want to do conversion from WCG to UTM for my 172 Raster, I can't use normal batch because I I can't re-arrange again the order of raster in Table of Content because the result are random name in ...
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80 views

How can I take a large netcdf and convert it to interpolated values in a different set of coordinates?

I've got a large netcdf (a small portion of the data is here) with the data in an even grid associated with an Albers Equal Area Conic projection. I've got the corresponding latitudes and longitudes ...
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64 views

How to install Proj4js.js in my localhost directory?

I'm developing a GIS website for vineyard management. I am using Openlayers with the WMTS IGN (French institute for geography) datas. It works fine. I also would like to add the possibility for the ...
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13 views

DD83 to State Plane conversion

I am having an elementary issue with a conversion I have completed successfully in the past in ArcMap10. I am trying to convert DD83 to State Plane 83 using Data Management Tools > Feature > Project. ...
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1answer
67 views

Is there any tool to reproject x,y coordinates, apart from Proj4?

I have a JEE project (Java, JBoss) and I'm looking for a library that allows x,y coordinates reprojection. I know about Proj4. Do you have any other option? Is it possible to find on the net a ...
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1answer
48 views

How to covert gridded (gnomonically projected by distance) data to lat/long data

I have a grid of data that is in a gnomonic projection, centered on a lat/long point (WGS-84). The grid has a 1km spacing. Given this I can easily obtain the x,y coordinates/distances from centre ...
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55 views

How to georeference a map - which is in projected coordinate system - using geographic lat long? [duplicate]

We have some hard copy maps which were projected in Gauss Kruger coordinate system (in the legend it has been mentioned). But, the coordinates were given in Geographic lat long (Beijing 1954). In ...