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

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23 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 ...
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0answers
22 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 ...
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20 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 ...
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62 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 ...
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3answers
45 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 ...
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2answers
23 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 ...
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2answers
15 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. ...
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11 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 ...
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1answer
20 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: ...
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30 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 ...
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1answer
47 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. ...
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74 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: ...
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1answer
183 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 ...
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24 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 ...
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21 views

Precision of conversion from WSG84 to ECEF and ECEF to ENU?

To convert from a global to a local coordinate system, I apply the following transformations. WSG84 to ECEG: with and ECEF to ENU: Let's assume that the semi-major axes a and e are known ...
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76 views

lat lon to ease-grid 2.0 using proj4j

I’d like to use PROJ4J to project wgs84 lat lons to the Equal-Area Scalable Earth (EASE) 2.0 Grid. It seems the EASE 2.0 grid uses the Behrmann projection which is just an Cylindrical equal-area ...
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38 views

What can I do to reproject rasters without modifying the original values?

I downloaded a series of Landsat 8 Images and I will be using QGIS to process them. The projection of 2 of them are incorrect, so I used "Warp tool" in QGIS to change them. The resulting rasters DO ...
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8 views

Performance: Reproject Cache vs. Drawing Vector data in correct projection

I have quite a bit of data that I am caching from UTM to Web Mercator. This is fine, but I have another process that automatically creates map book pdfs. These map books have been setup to read the ...
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2answers
49 views

How to Convert Property Survey Monument Marker Coordinates to State Plane?

I have a set of Connecticut monument locations (a monumented property survey using monuments designated CGS Mon. No. 1577-1580). Their coordinates appear to me to be in meters (244536.84 N, 386409.67 ...
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1answer
42 views

Converting GCS NAD 1983 to CA state plane

I have a polygon shapefile in GCS_North_American_1983. I'm trying to project it into NAD 1983 StatePlaneCalifornia III Fips 0403 (US Feet). This is my original file. When I run the project tool, ...
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1answer
30 views

Transform from Lambert Azimuthal “old” to ETRS89_LAEA

I'm currently struggling to convert a small .asc dataset with no defined projection. The projection that has to be first applied is Lambert Azimuthal "old" projection: In PROJ.4 +proj=laea +lat_0=48 ...
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1answer
103 views

Can I project a single set of coordinates that are not in a table or feature class with arcpy?

I have been searching for the easiest way to convert a single set of State Plane Coordinates (in units of "Feet") to Decimal Degrees using arcpy. All the methods I have seen so far involve one of the ...
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41 views

Can I use Redfearn's formula to convert between WGS84 and UTM?

I have GPS data at 1 point per second for several weeks in WGS84 latitude/longitude form. It was collected using a UBLOX GPS in 2015 in Australia (Zone 55s) Would it be correct to use Redfearn's ...
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1answer
59 views

Area and distance calculation/measurement unexpected after projecting? [duplicate]

I have converted a GIS shapefile of Botswana from the geographic coordinate system GCS_WGS_1984 to the projected coordinate system Africa_Albers_Equal_Area_Conic to be able to calculate the area of ...
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32 views

Is it possible to put a raster layer on a shifted Chinese basemap using leaflet API?

Recently, we want to develop an application with leafleat and gaode basemap because some features of these products fullfill our basic needs. We want to overlay some raster layers caculated by spatial ...
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3answers
67 views

Best projection / CRS for short-distance based analysis?

I'm having a bit of meltdown about projections and coordinate reference systems, and was hoping for a few pointers. I have 3 GIS projects, at 3 sites in Europe (the largest of which measures about ...
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1answer
51 views

Projection of Boston housing data

Boston housing data provided by GeoDa center is a well-known dataset. GeoDa Center provides this data in shapefile format. A metadata file included in the download indicates that the data use ...
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49 views

Create Envelope based on center point

I see in the Java SDK : https://developers.arcgis.com/java/api-reference/com/esri/core/geometry/Envelope.html they have : Envelope(Point center, double width, double height) Creates an envelope by ...
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1answer
77 views

Google Maps base map definition

I need to replace a 'Global Imagery' basemap in Google Maps. However if I replace it with "Openlayers.Layer.Google", that would use map projection of EPSG:3857 (900913). But I'm working with EPSG: ...
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1answer
59 views

Project a set of coordinates - points from an excel into a shape file with unknown coordinate system (map-match)

I am trying to project a set of coordinates (points) from an Excel spreadsheet, on top of a shapefile (map) with an unknown coordinate system. The Excel file was created by first creating a map with ...
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28 views

change from NAD 1983 to some PCS?

I want to ask how to change the coordinate system from NAD 1983 to some Projected coordinate system. I tried to change this DEM file to WGS 1984 (all of them) but when I did that my scale becomes 1:4. ...
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1answer
114 views

Formula to convert from WGS 84 / UTM Zone 34N to WGS 84?

Can anyone help me with the formula for converting from WGS 84 / UTM Zone 34N to World Geodetic System? My problem is I want to represent some properties (polygons) in some kind of a map (image). I ...
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1answer
101 views

How to project WGS84 raster in lat/long to WGS84 UTM in ArcMap 10?

I know this is suppose to be simple and I've found similar questions. However when I try to do the same (data management tools > projections and transformations > raster > project) inserting input ...
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1answer
61 views

How to convert GDA eastings/northings to WGS84 lat/long in QGIS

I'm using QGIS to map weed locations and have a mixture of data from GPS, shape files of contours, OSM all in a project with CRS WGS84 (lat, long). I am trying to add in a shape file I have been given ...
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1answer
49 views

Changing the projection transformation for a feature class after adding it to an mxd

Is there a way to select a different projection transformation after you've added a feature class to an mxd? I have a pretty complex mxd set up to use as a map service where the original data is in ...
6
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1answer
43 views

Why is there an upper limit to the SRID value in the spatial_ref_sys table in PostGIS 2.1?

I was trying to insert a reference system in PostGIS from http://spatialreference.org/, and got a constraint violation for spatial_ref_sys_srid_check. I checked that constraint and found that, when ...
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42 views

Satellite Image of same projection system , do not overlap

I have two satellite imagery with same projection system i.e. QND_1995_Qatara_National_Grid as Spatial Reference and D_QND_1995 as Datum. Satellite Image A) Received in WGS84 and converted it to ...
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107 views

Converting coordinate notation from GDA94 to WGS84 gives ERROR 999999?

I am trying to convert my data from GDA_1994 to WGS_1984 using the 'Convert Coordinate Notation' tool from ArcToolbox. I used the import XY data tool to import my csv file with x,y fields (among a ...
3
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1answer
31 views

Reprojecting to same srs shifting the layer

I am using ogr2ogr to reproject a shapefile. Here is what I have done. I have a shapefile A.shp. I used the following command to create B.shp: ogr2ogr -t_srs EPSG:3857 B.shp A.shp Now I reprojected ...
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1answer
53 views

Transformation accuracy or offset in ArcMap?

I'm trying to transform a map from UTM ED 50 zone 33N to WGS84 and vice versa in ArcMap 10.2.2. I'm doing this by using the Project tool in the Arc toolbox and choosing the ED_1950_TO_WGS_1984_12 ...
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0answers
11 views

Missing importfromURN method in gdal java wrapper

The java wrapper of gdal doesn't have the method importFromURN, and I want to use the projection system which is specified in the URN string format. Is there a way in which I can do that? Maybe I can ...
0
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1answer
59 views

How to project WGS84 to Kertau RSO in ArcGIS Android

How do I make a conversion from WGS84 (longitude, latitude) to Kertau RSO using ArcGIS Android? I looking into this for my project. Am I looking at the correct direction? I have following points in ...
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3answers
105 views

Best Projection for Getis Ord Gi* Statistic Analysis

I am about to calculate the Getis Ord Gi* statistic for some rasters whose extents are global. In choosing a projection, do I want to preserve distance (e.g. equidistant) to obtain accurate ...
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1answer
31 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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0answers
44 views

Reverse parameters of a projection map

I'm user of a soaring simulator named "Condor Soaring". This simulator is at the center of a community of enthusiastic people who build sceneries (landscapes) which represents quite accurately real ...
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45 views

Identify coordinate system used near Kuala Lampur

I have some coordinates that were given to me, and I do not know much about how they were taken. I thought they were UTM coordinates, but when I try to convert them using some online tools I always ...
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45 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 ...
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1answer
81 views

Issues with getting the height from SRTM gdalwarp WGS84(EPSG:4326) to Mercator(EPSG:3857)

I am trying to use the SRTM .hgt file to obtain the height of a location. My issue is that I wish to reproject the SRTM file from WGS84 to Mercator but the height returned is not consistent after ...
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1answer
83 views

Misalignment of EPSG:4326 and EPSG:3399 coordinates

I'm having a QGIS project in local coordinates (Gauss-Kruger, EPSG:3399) with some layers in the same reference system. On top of that, I want to display point coordinates, which I digitized using ...
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1answer
53 views

Layers with the same projected coordinate system and geographic coordinate system do not overlap [duplicate]

I have a blank map, I've set the data frame to the same projected coordinate system as the data I'm going to add. I have added one shapefile and it looks good. When I wave the cursor over the map the ...