A reference framework consisting of a set of points, lines, and/or surfaces, and a set of rules, used to define the positions of points in space in either two or three dimensions.

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How do I choose the geotransformation used at SpatialReference.org?

Each page at SpatialReference.org has a UI that updates coordinates as you pan/zoom around a small map control. Behind the scenes, it is performing a geotransformation. I looked, but don't see a way ...
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32 views

Converting WGS84 to UTM coordinates using R package gstat?

I want to convert WGS84 to NZGD2000 using R package gstat but I cannot get the right result. # Define the coordinate systems wgs_co <- data.frame(lon=x, lat=y) coordinates(wgs_co) <- ...
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2answers
27 views

National Map downloading wrong coordinates?

Edit 2 I figured out the problem. The download is a whole panel in the ballpark of 50 miles x 50 miles. The bounding box I requested was about 3x3 miles. My BB is a subset of the whole dataset that ...
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26 views

coordinate system are same unit also meters, but maps are not overlap [duplicate]

coordinate system are same unit also meters, but maps are not overlap WGS_1984_UTM_Zone_44N Projection: Transverse_Mercator False_Easting: 500000.000000 False_Northing: 0.000000 Central_Meridian: 81....
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15 views

East, north, up (ENU) velocities (m/yr) to long, lat and h; GPS

Have the velocities (east, north, up) data in m/yr. How can I convert this into lat, long and height (formula and etc) velocity mode (m/yr) 0.000036 0.001330 0.013553 offset at at first epoch (m)...
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1answer
22 views

How to identify the co-ordinate system (CRS, SRS) of a GeoJSON file?

Suppose you have an arbitrary GeoJSON file, and the publisher didn't give much supporting documentation - or perhaps it's been provided by a third party who don't know much about it. Is there a ...
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1answer
85 views

Finding the coordinate system info from a LAS/LiDAR file with Python?

I found several examples of how one can query and manually set a coordinate system on a tif/raster file (GDAL/Python: How do I get coordinate system name from SpatialReference? or Is it possible to ...
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1answer
45 views

How to tell what co-ordinate system a WFS server is giving?

I got a GML file from an ArcGIS-based WFS server and converted it to GeoJSON using Ogre (online ogr2ogr), but then got very strange results from that GeoJSON file. Here's the link to the ...
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1answer
44 views

What's the best way to handle a 'Site Datum' in QGIS?

So I have a client with a site datum, which is to say they have an arbitrary coordinate reference system with coordinates between -1000 and 1000 in X and Y. I have a list of ~20 coordinates that maps ...
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1answer
32 views

Longitude difference to Meters

I have been trying to find an effective method (be it an equation or table filled with values) that would be useful for converting differences in longitude values into a distance in kilometers. It ...
2
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1answer
27 views

Direction of the Y axis in OpenLayers

A have an openlayers map with with two layers: a Tiled image layer (served through zoomify protocol) and a Vector layer. I draw boxes/rectangles on the image then get their geojson coordinates and ...
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26 views

Planar vs. Geodesic large differences

Using ArcMap aerial image in WGS84 my line measurements in Planar seem to come out very high, while Geodesic seems accurate. I am concerned about this and wonder why Planar measurement does not match ...
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2answers
16 views

Problem transforming data from GCS Krasovsky to GCS WGS84

I am having trouble transforming data from GCS_Krasovsky_1940 to GCS_WGS_1984 in ArcGIS 10.4.1. I'm using the Project tool, but the geographic transformation parameter is left empty and I would expect ...
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1answer
50 views

How to get the extents of a spatial reference system?

In general, how does one get the valid extents of a spatial reference system? In particular, is there a way using the Proj.4 library? I attempted to use the information from the epsg.io website, but ...
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2answers
35 views

Python, Describe.spatialReference errors

Having trouble getting my code to work. Keep getting IOError that my parks.shp doesn't exist....not sure I understand what this is saying. import arcpy mxd = "D:\...\TravisCountyAustinTxx.mxd" ...
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25 views

Get two Shapefiles into one extent

Using QGIS 2.12: I have two shapefiles. One is a: xMin,yMin 4452526.72;5331472.42 : xMax,yMax 4453161.88;5332883.26 extent, tho I have set it to GK (DHDN) the other one is a: xMin,yMin -46.874;-6....
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12 views

Conversion from 32643 to 4326 in Sql server

I am working with SQL server 2012 Spatial Database and i need to convert from Spatial Reference System 32643 to Spatial Reference System 4326. Is there any spatial function for this type of spatial ...
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2answers
62 views

How do I convert XYZ coordinates to another projection system

I am trying to convert between coordinate systems in QGIS. I have a point file in NZGD49 coordinates (EPSG:27200) (referenced to the geoid) which I am trying to convert to NZGD2000 coordinates (EPSG:...
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29 views

Determining scale of downloaded data (shapefile, raster, etc)?

When downloading digital data (either shapefile, raster, layer, GDB etc.) how do you determine the scales? Is there a simple way? I know scale definitions are different for geographers and ...
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0answers
8 views

Openlayers switches coordinates of bbox

I do have two questions: First, I have a custom projection that works fine with a arcgis tiled service. However if I add any other wms, the bounding box (bbox) in the url is incorrect. Second, The ...
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1answer
35 views

Global Projection in Meters

Currently I only have a GCS (WGS84), but it only allows for decimal degrees. Is there a global projection or CRS that would allow me to use Meters as a measurement? I am using this for a tool that ...
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2answers
66 views

Why can't QGIS recognize the right Layer CRS?

I have a vector layer (shapefile), that I projected with ArcMap 10.4 into UTM33 (EPSG: 25833). If I load this layer in ArcMap, 25833 ist always recognized as the CS of the layer, as expected. But ...
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3answers
46 views

Generate Proj4 definition from given parameters

I'm an archaeologist and I'm struggling with the generation of a reference coordinate system for georeferencing the Spezialkarte der Osterreichisch-Ungarischen Monarchie (XIX century). I've found the ...
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25 views

QGIS reads CRS different [duplicate]

I have a data frame with more than 100000 observations. I'm trying to convert this data into a shapefile in R. I give some CRS to data in R but when I open the shapefile in QGIS I see a different CRS. ...
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2answers
52 views

Projection: conversion of coordinate pairs in Python

Google Translated I am using QGIS and wish to automate the export of a map (an existing project) to which I add a vector layer (representing a construction zone) in pdf format. The problem is: The ...
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1answer
35 views

GADM Phillipines data won't align to WGS84

I'm currently working with several datasets in QGIS that lay 100% perfect when I match it on Google Earth using its inter-app plugin. However, when I load administrative regions from GADM, the entire ...
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1answer
25 views

Appropriate projection for US distances?

I am generating distances between crash sites (points) and urban areas (shapes) and am wondering what the best projection is to use for this task. The area of interest is limited to the U.S. (Alaska ...
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10 views

Reprojecting Modis data using MCTK Aand MRT

I am trying to re-project MODIS product MOD15A2H Fpar product. I need my data to be georefrenced so That I can create ROIs and find pixel values. However, I am having trouble georeferencing the data ...
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1answer
41 views

GRASS on QGIS is generating new CRS

I am experiencing a strange problem by using the GRASS toolbox on QGIS 2.14.3 Essen. Even if in settings>options>CRS I select to use the project CRS when creating new layers, the results of GRASS ...
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1answer
30 views

Choosing map projections specifically for San Francisco Bay Area?

I am asking because I am not familiar with specific map projections for the San Francisco Bay Area.
2
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1answer
35 views

Clipping layer when using new projection in QGIS?

I'm having trouble clipping a shapefile in QGIS so I'll take you through my steps. I've downloaded the land shapefile here http://www.naturalearthdata.com/downloads/10m-physical-vectors/ When I load ...
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1answer
28 views

How can get data unit by ArcPy?

Is there a way to according to the data's spatial reference to get the unit of data, for example: wgs1984 → Decimal degrees, UTM54 → Meters.
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1answer
52 views

Defining Datum in QGIS?

I got two shapefile of the same coordinate reference system (CGRS93_LTM), one in QGIS and the other in ArcMap. However they got different prj. files QGIS file: PROJCS["Transverse_Mercator", GEOGCS["...
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0answers
14 views

How to import KML with WGS84 coorginates into ArcGIS with S-JTSK_Krovak_East_North?

My girlfriend has map in S-JTSK_Krovak_East_North (Slovak Republic) and she wants to add points from KML, which is in WGS84. How should she do it? Everything that she tried so far placed the points in ...
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1answer
26 views

Unable to display Gauss Krüger- points

I have this list of sampling points and they told me to display them in ArcMap 10.3.1. This are Gauss Krüger coordinates of soil samples in Austria: From a table I use ->"Display XY data" and the ...
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1answer
23 views

Change project CRS = discard GCPs?

[Using QGIS 2.12 Lyon on Mac with OS X 10.10.5] I am struggling to georeference some old hydrographic survey maps that are in the form of TIFF files (.tif). If I open the georeferencer tool and set ...
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1answer
32 views

Convert WGS-1984-Pseudo Mercator to OSGB1936

I've imported UK wide coverage of ESC wind exposure data as a raster to ArcMap 10.2. The data is in WGS 1984 Pseudo Mercator which puts it way out against the UK OS standard grid. I can't get it to ...
5
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1answer
303 views

Odd, old coordinate formatting from 1997 GPS

A typical coordinate is given as 68 35 067 N 123 54 817 W. I thought maybe some old timers could help me out. The author says in his report of the time that they were using a GPS, but I contacted ...
2
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0answers
25 views

Sri Lanka paper map sheet key

I have a list of river gauging station locations, with the coordinates given in a local system: L/24(5.5*8.15) O/13(3.5*0.15) P/3(0.9*2.1) M/17(13.5*1.6) Presumably these coordinates are pointing ...
2
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1answer
38 views

Converting UTM coordinates to WGS 84

I know the coordinates below are in UTM 36N (due to the EPSG code), and I can convert them with several websites online to wgs 84 and see them in Google Maps. However, been helplessly looking the ...
2
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1answer
47 views

Creating a Line at a Length and Angle in WGS84 - Arcobjects

I need to draw a line at desired length(around 10-20 Km length) and a user entered angle. The map/data uses WGS84 coordinate system. So the measurement is geodesic. Here are the methods that I tried. ...
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2answers
70 views

Assign nearest raster cell value to point

I came across to a similar issue described in Finding nearest raster cell value based on vector point? I understand the proposed solution with Raster to Point and then Spatial Join with (for example) ...
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2answers
105 views

How to read geographic coordinates when the Shapefile has a projected spatial reference

I have a polygon Shapefile and want to read the polygon's vertices using OGR and Python. The reference system of the file is projected. However, for further processing I need the geographic ...
3
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2answers
30 views

Is there a SQL Server package similar to Oracle's SDO_CS?

I see that Oracle's SDO_CS package is able to do datum transformations. I'd like to do datum transformations in SQL Server. I searched, but have not found something like this for SQL Server. Is ...
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1answer
49 views

Why is GeoTIFF squashed in WGS84 data frame of ArcMap?

I have a government-sourced geotiff which I have imported into ArcMap 10.4 as a raster basemap. In a TIFF viewer it displays correctly but in ArcMap it appears vertically squashed by roughly 20%. The ...
2
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1answer
83 views

How can I change the origin (top left corner) coordinates of a raster using PyQGIS?

I am developing a python plugin for QGIS. The purpose of the plugin is to properly open an HDF5 dataset as a raster. Opening and displaying the raster can be done without the need for a plugin, ...
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34 views

using gdal to convert from NAD83 to WGS84

I'm trying to use gdal in OSGEO4W to convert from NAD83 to WGS84. I'm very new to this so if you can, be as thorough as possible with your answers. The command I'm running is gdalwarp --config ...
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1answer
40 views

Georeferenced images gives wrong scale

When I georeference satellite images with a CRS for my region (Hartebeeshoek94), I get a scale of 1:10 and larger. But when I use WGS84 the scale appears correct, e.g. 1:50 000. I am using QGIS v2.13....
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1answer
23 views

ArcGIS Explorer coordinate system

I work with ArcGis Explorer and the coordinate system default is WGS 1984. Is it possible to change the coordinate system?
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43 views

How do I get imported KML circles to appear as circles rather than ellipses in QGIS?

I have a QGIS project, CRS is WGS84 (EPSG 4326). I have OpenStreetMap as the base layer. I have loaded some point features. I have created a buffer zone around some of these features with WGS84 as ...