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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1answer
10 views

Converting grid co-ordinates to GPS co-ordinates

I need to convert grid co-ordinates from an old document to GPS co-ordinates that I can plot into Google Earth and ArcGIS. Here are the instructions: 'It was unfortunately not possible to produce ...
-1
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0answers
19 views

QGIS 'Clip raster by mask layer': Problem loading output [on hold]

I'm using QGIS 2.8, currently developing a python plugin and at some point I have to execute consecutive processing algorithms. When it comes to loading the layer created by GDAL algorithm 'Clip ...
1
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2answers
23 views

Load USGS DRG into QGIS

I'm trying to load some DRG data from the USGS into QGIS. The source data uses UTM coordinate and I can't seem to get it to overlay with WGS 84 vector data. I (think) I've followed the recommended ...
3
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2answers
37 views

How to fix the error between two coordinate systems?

How do you think the shift of line is due to morphological change of river? Or it is due to deviation between two coordinate systems? Please point out !!
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0answers
17 views

map data is not lining up to basemap or ArcGIS Online map

on arcmap: i have tried lining my data frame coordinate system to the WGS 1984 World Mercator position but still will not align to basemap when I publish to ArcOnline. am i missing a step here?
2
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1answer
19 views

How to obtain WGS84 or Projected Bounds for given EPSG in postgis?

On the http://spatialreference.org, for almost all SRS are definied WGS84 Bounds and Projected Bounds. How to obtain this bounds from postgis? Spatial_ref_sys does not contains this information.
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0answers
20 views

rasters written with gdal show up with units of meters when they should be degrees

I have some SMOS soil moisture data packaged in a netcdf format distributed by "cp34-bec". I have been able to use GDAL to extract this data as a raster layer, using a projection i think is ...
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2answers
40 views

Which co-ordinate reference system should I use for the British Isles?

I'm wondering which co-ordinate reference system would be the best to use for a project covering the British Isles, since the UK and Ireland have separate systems - British National Grid and Irish ...
1
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1answer
28 views

What is/are the coordinate systems used in South Africa?

What are the principal datums and projections used in South Africa including the names of geodetic datums and their projections?
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1answer
40 views

Output of Add XY Coordinates?

I am trying to get the coordinates of the coastline. I have made a shapefile with points selected along the coastline, the coordinate system I have the shapefile under is WGS 1984 UTM Zone 30N. I have ...
1
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1answer
38 views

Adding Vertical Reference in Python to ArcGIS feature dataset

I am creating a python script to generate a terrain. In the process I am creating two feature datasets. However, in order to successfully create this FD, i need both horizontal and vertical datums. I ...
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0answers
25 views

Getting ArcGIS Desktop to understand LOAC so it calibrates coordinate systems correctly?

So I downloaded some data from the 2011 UK Census and I want to add it as a layer on my basemap. I couldn't see it on the map although it was in the Contents tab in ArcMap, so I zoomed out to full ...
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0answers
35 views

Add XY Coordinate tool generating bad values [closed]

When I run the Add XY Coordinates tool, I end up with these XY values. At first I thought this might be a projection issue. I adjusted the projection in arccatalog to make sure it was the same, but ...
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0answers
23 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 ...
2
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2answers
73 views

When does a local system introduce errors in a map due to the earth's curvature?

If the extent of a map is very small, like a building plan, there is no coordinate reference system used. To which scale/size of building is that acceptable? Of course it depends on the precision ...
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0answers
21 views

How to create a customized grid with two coordinate systems?

I need to put two grids on a map - one in NAD27 State Plane CA Zone 5, and the other in NAD83 State Plane CA Zone 5 (feet) and have the grids be formatted properly. If I go into the Data Frame ...
1
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1answer
50 views

How to set CRS in QGIS using pyQGIS

This question is very similar to these one , but it's doesn't work for me. This is my try: ........ vlayer.setCrs(QgsCoordinateReferenceSystem(25830)) ...
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1answer
26 views

convert from PCS: Palestine 1923 Palestine Grid to WGS84 coordinate system

I have the coordinate system of points in GIS in PCS: Palestine 1923 Palestine Grid, is it possible to convert the coordinate system to WGS84 coordinate system?
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2answers
68 views

MODIS-Sphere to WGS84 coordinate system in ArcGIS

I want to overlay two global raster datasets on land use which use different coordinate systems (MODIS-Sphere & WGS84) using ArcGIS Desktop. There seems to be no direct transformation option from ...
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0answers
22 views

Troubles setting correct projection in SDE

I have to transformate data and change the coordinate system but have troubles to set it correct programmatically. I have: ArcGIS 10.2 / MS SQL-Server 10.0.5520 / sde 10.2.2 My steps: 1) Some ...
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1answer
25 views

How to do a coordinate transformation with EPSG codes in CTS?

Let's say I want to convert the following WGS84 (EPSG:4326) coordinate to UTM32N (EPSG:25832): 54.321, 9.876 Is there any tool to reproject x,y coordinates, apart from Proj4? links to the CTS wiki. ...
0
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1answer
35 views

What simple and light Java library to use for WGS84 to UTM conversion?

Geotools and Geotoolkit are huge and complicated. CTS (1.3.3 from Maven) failed on me by not even being able to run its own test example (slightly modified ...
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0answers
27 views

QGIS 'Save As' Reprojection Produces Different Results from ogr2ogr command line

Another 3857 vs 4326 question. When I reproject from EPSG:3857 to EPSG:4326 (and from .shp to .geojson) via the QGIS 'Save As' dialog, I get results that display in the expected place on Google Maps. ...
2
votes
1answer
53 views

Measuring distances when crossing UTM zones?

I like to calculate distance between two UTM coordinates which are in different zones. Could any one point me how I can do this. I found that we can map these coordinates in to a new projection for ...
0
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0answers
11 views

In PostGIS, is it possible to use `ST_SnapToGrid` align to a coordinate system?

I am wondering if it is possible to align a raster or geometry by specifying the coordinate system using the spatial reference identifier, i.e. 4326 for WGS 84. I did not see anything in the ...
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1answer
63 views

What is a coordinate system?

Please help me understand a coordinate system and how a coordinate system is relevant to a region of interest such as South Africa. I came across this term a couple of times and overlooked it because ...
2
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2answers
74 views

Projecting shapefile with unknown CRS to WGS84 using QGIS?

I've tried setting QGIS to on the fly, changing the layer settings, nothing. I'm at a lost cause. Although I am not a GIS professional. ...
2
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0answers
23 views

Calculating area with Europe Albers Equal Area in QGIS [closed]

I am trying to calculate the area for a number of polygons in EPSG:102013, having changed it from EPSG:3857. When using the field calculator $area, the entire column was returned as nan. Has the ...
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0answers
19 views

same projections but different extents

I have two shapefiles that contain the same projection (WGS_1984_UTM_Zone_51N) but their extents are far from each other. One shapefile has this parameters: Left:2.000000 m Right:7791.000000 m ...
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0answers
39 views

Is it possible to find Lat,Long coordinates of points within a polygon whose GPS coordinates is known [duplicate]

I have a set of gps coordinates which make up a polygon. Is it possible to find Latitude,Longitude coordinates of points within this polygon using GPS coordinates of the polygon I already possess. ...
1
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1answer
26 views

Adding multiple datasets to ArcMap with the same coordinate reference system but different transformations

I want to be able to load multiple datasets to my mxd, using various CRS (coordinate reference systems). Some of these datasets will use the same CRS, but with different transformations. When I load ...
0
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1answer
45 views

What would a map of the world look like if lat/longs were treated as projected coordinates? [duplicate]

I'm not quite sure if I'm phrasing this right. It's just occurred to me that lat/longs are two dimensional coordinates like any other projected coordinate system, so it's presumably possible to create ...
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0answers
28 views

Spatial Joining Pol

I'm trying to spatial join two polygon layers. I would like to see which land parcels of layer 1, can be found in layer 2. Which match option can best pick up those land parcels which are common. Is ...
1
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1answer
57 views

What projection to use for many parts of the world

I'm creating a poster which has many separate maps (rivers of the world). I'd like to use a similar projection for each of them, so they're comparable. I guess I want some parameterized projection, ...
1
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0answers
45 views

Georeferencing reversal of image

I georeferenced a map and it posted to canvas as a mirror image of the original map. I set my project CRS before starting and also made sure to set the same SRS for the Geotiff being created and ...
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0answers
26 views

Creating a kml file in Google earth in UTM format to get attributes in UTM format

i want to create kml file in google earth and use it in UTM coordinate system for preprocessing in HEC Georas.When i imported the kml file in GIS, it still showed the attribute in WGS format as in the ...
0
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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: ...
1
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1answer
66 views

How to detect coordinate reference system (CRS)? – I cannot display two vector layers in QGIS at the same time!

When I in QGIS try to display layer (a) together with another layer (b) that differ in their CRS it doesn’t work. Both are vector shapefiles. I have tried both with using QGIS ‘on the fly’ CRS ...
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0answers
40 views

How do I get the lat-long coordinate of point 1 from a survey plan [on hold]

Here are the data from the survey plan: TIE LINES from BLLM No. 3, PLS 561, to corner "1" of: LOT ----------Bearing--------------------Distance Boundary ----S 36deg 41min W ------11,641.21 meters ...
2
votes
3answers
65 views

Strange coordinate system [closed]

Here's an extract of a feature from the web that I converted to geojson using qgis. However, the coordinates are not standard are at all and when trying to actually preview it on the web it fails, ...
0
votes
1answer
41 views

Is there a way to transform a node OSM point into the reference GPS system of a car?

I have a car with a GPS (WGS84) and a camera (who shot the road) fixed on it. I would like to know is there is a way to get the transformation from a OSM node to the GPS cartesian coordinate fixed on ...
1
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1answer
62 views

how can I put those x y location in ArcMap?

Does anyone can help me some tips to put those x,y in the excel spreadsheet to Arcmap? It doesnt show on the map when I try. I think the problem is the projection. I tried coordinate system: ...
0
votes
2answers
52 views

CRS problem between QGIS and fiona / OGR

I have a really annoying problem working with QGIS for visualization and python (fiona / OGR) for the actual operations. I am, by example, doing a simple dissolving operation with fiona. The input is ...
0
votes
1answer
24 views

Where are coordinate system files saved when using the ArcGIS Citrix app?

Is there a standard location where coordinate systems are saved within ArcGIS when using a Citrix app? Or maybe a redirected folder location?
1
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1answer
40 views

arcgis 10.2 .shp with no projection info but .xml file

I need help opening a shp file which has no projection info in ArcGIS 10.2 I have .shp , .shx , dbf and .xml file. The .xml file details are below . QUESTION : can i make .proj from below ...
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0answers
42 views

bounding box - generate coordinates

I will be using mongodb database which supports data on an Euclidean plane (not spherical). I will be performing queries which return all points within a box. For the box I need to specify the upper ...
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2answers
75 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: ...
3
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1answer
66 views

Is it possible to define a custom CRS for a shapefile in QGIS that uses hundredths of a US foot?

I have several polygon shapefiles whose coordinates are defined as 100x their original coordinates projected from the Washington State South HARN State Plane in us-ft (EPSG 2927). I would imagine the ...
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0answers
22 views

Proper projection name for NAD83 2011 revision

I have two PRJ files, one from ESRI and another from some custom GDAL/OGR code I wrote (pasted below). I was trying to have both work in NAD83 UTM10N with the 2011 revision. The ESRI file has 2011 in ...
2
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0answers
71 views

Converting local XYZ to geographic coordinates

I am working with a computer program called PEP for Windows by Airbus, which is able to calculate exact flight paths of an aircraft, based on many inputs like weight, temperature, wind, etc. The ...