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.

learn more… | top users | synonyms (3)

0
votes
0answers
19 views

Estimating world position of origin of coordinate system based on its members global position?

I have n points of interests (POIs). I have a local coordinate system. For all these n POIs I know there position in this system, that is there x, y, z translation (local position) from origin of ...
0
votes
1answer
14 views

error 00289 while projecting raster

I tried to project satellite image of pixel size 2.5m*2.5m. It's in wgs84 UTM zone 44 North. I tried to project it to nepal_87 but failed. The error massage displayed was 'error-000289,failed to alter ...
0
votes
0answers
20 views

Coordinate Transformation in LAStools?

LasTool program only limited to UTM platform for coordinate transformation. (las2project,las2transform) Is there any other ways to transform coordinate for local projection in lastool? For example ...
13
votes
1answer
9k views

Projecting sp objects in R

I have a number of shapefiles in different CRSs (mostly WGS84 lat/lon) that I'd like to transform into a common projectly (likely Albers Equal Area Conic, but I may ask for help on choosing in another ...
1
vote
1answer
39 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
vote
2answers
362 views

Aligning data from PostgreSQL and ArcGIS Desktop in QGIS? [closed]

I am pretty new to ArcGIS and QGIS. I have loaded some geometry data in QGIS from my postgres database, then I have also loaded the same data in ArcGIS. Then from ArcGIS i have created a shapefile ...
5
votes
3answers
8k views

ArcGIS coordinate system

I'm developing some software using ArcGIS API, but the question is rather theoretical, as I just came from Google Maps and have no idea where to start; everything seems to be different including the ...
1
vote
1answer
549 views

Defining multiple projections inside a file gdb [error 000289 failed to alter spatial reference]?

I am importing multiple shapefiles into a filegdb in ArcGIS 10, and using the following code to define the projection of the feature once imported, to the .prj of the original .shp file. Here is my ...
0
votes
1answer
219 views

Coordinate mix up

I am working on a basic map, pulling coordinates from google earth, converting them to decimal degrees in excel, and then importing them into qgis. I am using qgis 1.8. When converting from degrees, ...
1
vote
2answers
396 views

WFS: How to specify input coordinate reference system

Geeoserver allows to specify output CRS by parameter srsName in WFS GetFeature. Is there a way to specify the input CRS? I am displaying layers of different CRSs in my map - all reprojected to ...
3
votes
2answers
46 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 !!
1
vote
2answers
29 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 ...
2
votes
2answers
388 views

Calculating surface using Lambert correction?

i'm using lambert conformal conic , so we have distortions along any given parallel , i would like to get the area used to solve this distortion. I have calculated the area using Shoelace formula , ...
0
votes
0answers
31 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
votes
1answer
29 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.
1
vote
0answers
37 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 ...
0
votes
2answers
100 views

How to choose a coordinate reference system

I have a jpeg image of a reserve's layout and would like to use it to plot animals movements on i.e. GPS points. I have no idea which coordinate reference system to choose during the "georeferencing" ...
0
votes
2answers
45 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
vote
1answer
100 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?
3
votes
4answers
9k views

Change number of decimal digits for features in ArcGIS 10?

I am editing vertices in polygons and points in ArcMap 10, and realised that they only hold 3 decimal digits for the X, Y coordinates, but I would like at least 6 decimal digits. Even if I type in ...
0
votes
1answer
47 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
vote
1answer
48 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 ...
0
votes
0answers
28 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 ...
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 ...
5
votes
2answers
1k views

How to let the user select a spatial reference using ArcObjects?

I need to build a tool where the user selects a coordinate system for a given CAD file. What is the easiest way to do this with ArcObjects? Obviously, I could populate a list with the hundreds of ...
0
votes
2answers
87 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 ...
3
votes
2answers
2k views

What is the process to calculate Helmert parameters?

I have some double points (the same points in 2 different datums). I'd like to calculate the Helmert parameters but I don't understand how. NOTE: I don't need software. I need an algorithm in order ...
-1
votes
1answer
70 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
votes
2answers
87 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 ...
1
vote
1answer
81 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)) ...
0
votes
1answer
50 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. ...
1
vote
2answers
257 views

How can I add custom CRS with +proj=mercxx to QGIS 2.2.0 Valmiera?

i've builded a custom proj.4 library, tested it by command line (proj and cs2cs) and with postgres/postgis. All works fine. Now i'm trying to make the same with Qgis 2.2.0. I've replaced the original ...
1
vote
1answer
52 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?
2
votes
1answer
120 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
votes
0answers
29 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 ...
0
votes
1answer
86 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 ...
0
votes
0answers
48 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. ...
0
votes
0answers
22 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 ...
2
votes
2answers
89 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
votes
1answer
517 views

Leaflet setView with non lat/long CRS

Is it possible to use setView when using an alternative CRS? var map = L.map('map',{crs: L.CRS.EPSG26915}).setView([4970081,477018], 13); // Returns: Uncaught TypeError: Cannot call method ...
0
votes
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. ...
2
votes
0answers
26 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 ...
0
votes
0answers
32 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 ...
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: ...
1
vote
1answer
27 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 ...
1
vote
0answers
80 views

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

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 ...
1
vote
0answers
56 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 ...
0
votes
1answer
50 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 ...
11
votes
3answers
4k views

Official term for latitude longitude coordinate system?

May I know what is the correct specific term for latitude longitude coordinate system? With "Geographic Coordinate", it seems to be a general term for every other system?
2
votes
1answer
137 views

British National Grids projection does not add Ordnance Survey grids to shapefile?

I have created a shapefile in ArcCatalog by right-clicking the folder I want it in, then selecting new, then shapefile, then changing the type to "polygon", and using the British National Grids under ...