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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3
votes
1answer
141 views

Create Archimedean spiral with geographic coordinates

I don't know if this is the right place to ask but here it his. I want to create an Archimedean spiral based in some location. Lets say I have this set of geographic coordinates (48.860770, ...
3
votes
0answers
213 views

Is there a way to expose Spherical Mercator Lat Lon in Google Map API?

The map tiles in the Google Maps are in Spherical Mercator projection (srid 900913), but in the API the methods report coordinates in Lat/Lon WGS84, e.g. map.getCenter(). Is there a way to return the ...
3
votes
0answers
216 views

Statistically comparing two sets of coordinates [closed]

I have been given a task to compare two sets of points, one set being a set of predetermined points, on the other being a set of actual points that were taken in the field. I have to compare these ...
2
votes
0answers
114 views

Problem when converting to LCC projection

I am very much so a beginner.. but here goes. I have two maps that should line up with each other, but their projections are different. I've tried to use the gdalwarp utility to match them up, but ...
2
votes
1answer
513 views

How to get the Parameters for a Lambert conformal conic projection CRS in QGIS 2.6

I am currently having some trouble adding the CRS to a vector file that I want to re project to WGS84/UTM. The shapefile is using Lambert Conformal Conic Projection; ITRF92 horizontal datum and GRS ...
1
vote
1answer
122 views

Adding geometry to QgsVectorLayer with lon/lat coordinates

I'm creating a custom Qt app that uses pyqgis for showing data on maps. I have successfully created a map canvas that shows a world map from a WMS server. Now I'd like to overlay data on this map. ...
4
votes
3answers
393 views

Which equal-area projection to use for UK?

I have a bunch of UK polygons that are saved in my PostGIS database as WGS84 projection. I would like to calculate the area of these polygons using st_area. According to this answer I can save these ...
0
votes
2answers
62 views

Openlayers2 checking coordinate system of WKT or KML file

In my Openlayers2 based project I give the possibility for users to upload their own features in KML file or with a WKT string. I only want to accept features with ESPG:4326 coordinates. Otherwise a ...
3
votes
1answer
86 views

Where are the elements of an ArcGIS SpatialReference as a string representation defined?

This seems absurd, but I cannot find any documentation on what the various elements mean in the string representation of an ArcGIS SpatialReference object. The first part is obviously the Well Known ...
2
votes
2answers
330 views

Adding * .prj file to output via Python script tool that creates fishnet?

I'm a new python user. I wanted to make a tool box like fishnet in ArcGIS 10.2. Everything, works fine. However, at output there is no .prj file, although spatial reference was defined at the tool. ...
4
votes
1answer
131 views

proj.4 definition for (obsolete) UK War Office “Italy South” grid

I'm helping a friend convert his late father's war diary coordinates to WGS84. I have a proj.4 definition that appears to work in QGIS, but if I transform a scanned map with gdalwarp, it's not even ...
2
votes
1answer
169 views

PostGIS GML round trip confusion

I've investigated the issue of coordinate order in GML and each time I think I've got it but I find my self confused once again. I think some of my confusion may be to do with PostGIS. Doing a ...
3
votes
2answers
70 views

Compensating lat/long offsets after conversions

In my application I am doing conversions between two different formats of data. First format is a simple one containing NE and SW coordinates for a given rectangular area: area = { "sw": { ...
3
votes
2answers
169 views

Points in Polygon Query but having CRS issues (QGIS)

I have two files: A csv file that has lat longs listed for points. A shapefile that contains England NHS CCG boundaries (which usually uses the British National Grid). When I 'add a delimited ...
1
vote
0answers
60 views

Why do I get unexpected coordinates after converting EPSG 102014 to EPSG 4326?

I have this Europe map (EPSG 102014) and I am trying to convert it to EPSG 4326 using geoconverter.hsr.ch After the conversion is done, I expect that coordinates are in the range of -180,180 and ...
0
votes
2answers
51 views

Unknown Coordinate System Cadastral?

I have point data from a proprietary source that came in a coordinate system I do not recognize. Here is an example: Lat: 35205357 Long: -11.15933 It looks like a combination of UTMs and ...
1
vote
2answers
62 views

How to specify a map units line wider than 100000 units

Sorry if this is a very beginner question, but I can't seem to find an answer online by searching. Is there a way to increase the size of the "map units"? I'm trying to draw lines attached to my ...
3
votes
1answer
217 views

Reprojecting between NAD27 and WGS 84 part III

I am trying to perform a reprojection for data with datum Nad27 to WGS84 datum. According to AndreJ in some previous questions in Stackexchange (CRS reprojection for instance) QGIS uses internally by ...
4
votes
2answers
152 views

CRS reprojection

I am trying to change the CRS of one shapefile that is originally in NAD27 to WGS84 in Qgis 2.6. When I proceed to make the change, I still continue to see the file in UTM coordinates... I've tried to ...
0
votes
1answer
36 views

problem changing CRS of a shapefile [duplicate]

I am trying to change the CRS of one shapefile that is originally in NAD27 to WGS84. When I proceed to make the change, I still continue to see the file in UTM coordinates... I've tried to save the ...
1
vote
1answer
566 views

Is there an EPSG code to specify WGS84 in (lon,lat) order instead of (lat,lon)?

Is there an EPSG code like EPSG:4326 or EPSG:4329, but that specifies (lon,lat) order instead of (lat,lon)? I've tried exploring the websites http://spatialreference.org and ...
1
vote
0answers
1k views

Points In Attribute Table Will Not Display In Data View

I am using ArcMap 10.2.2 and opening a shapefile of points. My issues is this: the points do not appear in the data view. In other words, I cannot view the points in the display where they usually ...
2
votes
1answer
22 views

Grids not originating from 2D parameter spaces

Is there any specific name for grids on sphere (or geoid, or any other manifold/surface) that do not originate from 2D parameter space? For example generating a grid on a sphere using icosahedron ...
1
vote
2answers
120 views

Copy Feature Class to Feature Dataset

On trying to copy a feature class to a feature dataset, I get this error message (see the screen shot). Any ideas how this is happening? error copying from FeatureClass to Feature Dataset
1
vote
1answer
97 views

Which parameter and Data Type to set for spatial reference in ArcGIS Python script tool? [closed]

I developed a python script for user defined grid and I want to make a tool from this script. The problem I am facing is to set up parameter for spatial reference. I used GetParameterAsText ...
1
vote
1answer
364 views

Is there a way to change the QGIS default CRS?

I'm working in a UTM projection and bringing in dxf layers from a different program. The dxf files are all in the correct UTM coordinates already, but when I bring them in I need to change the CRS to ...
-1
votes
2answers
741 views

Formulae to convert WGS84 coordinates (B,L) to spherical coordinates (phi,lambda)?

How to convert WGS84 coordinates(B,L) to spherical coordinates(phi,lambda)? I Need Formulae? the thing I'm wondering seems quite simple but I've been searching through internet and library of my ...
1
vote
0answers
68 views

How to solve coordinate differences between packages

I have two maps generated by two different methods. The first, I used maps package and the function map() and symbols(). On the other hand, I used the ggmap package with the ggmap() and geom_point() ...
0
votes
0answers
20 views

Why are Lat/Lon Coordinates often displayed as Lon/Lat in data sets? [duplicate]

Why are Lat/Lon Coordinates often displayed as Lon/Lat in data sets? Thanks in advanced!
0
votes
1answer
544 views

Creating a spatial reference in arcpy from projection name

I am using ArcGIS 10.2.2, Python 2.7. I want to create a spatial reference from the name of a projection, e.g. NAD_1983_BC_Environment_Albers, using the arcpy tool ...
3
votes
1answer
177 views

Unknown Spatial Reference after Georeferencing in ArcMap

I am trying to georeference an image base on another *.tif, after rectifying i still have my Image as unknown spatial reference. Does somebody know how I can fix it?
1
vote
0answers
283 views

Why can't gdal save CRS information to GeoJSON?

gdal fails to add CRS definitions to GeoJSON files in some cases. Try this, for example, from any linux terminal that has gdal installed: # download the data wget ...
1
vote
1answer
508 views

Checking whether Spatial Reference is Projected Coordinate System using ArcPy?

I'm modifying CreateFishnet in ArcGIS 10.1 using python.. I want to ask the user to input a projected coordinate as spatial reference. How can I check if the user didn't put geographic coordinate by ...
0
votes
1answer
218 views

Precision loss when trying to select the latitude and logitude coordinates from an sde.ST_GEOMETRY using SDE.STX() and SDE.STY() functions

In an oracle 11g enterprise geodatabase I am trying the following: INSERT INTO MySTATION (STATION_ID, DB_VERSION_NU, CREATED_DT, MOD_DT, SHAPE) VALUES (1, 0, sysdate, sysdate, ...
1
vote
0answers
32 views

Is spatial reference information suceptible to be translated?

In an English application that uses ArcObjects API from ESRI, the information regards the spatial reference system is displayed in English as the API gives it. If the application is translated to ...
1
vote
1answer
249 views

How to set the Measure Tool Ellipsoid Default Behavior?

Using QGIS 2.6.0 Brighton, I want to overlay a shapefile (EPSG: 26910, Nad83 UTM10) over OpenLayers Google Satellite (EPSG: 3857, Pseudo Mercator), and reliably measure distances. Furthermore, I want ...
0
votes
1answer
213 views

Definition of the WGS 84

I'm having some trouble getting the following things straight with , does this make sense? EPSG:4326 WGS84 Coordinate system: WGS84 Datum/Ellipsoid: WGS84 Projection: longlat
3
votes
1answer
334 views

How to export projected layers with relative cartesian (x,y) coordinates in ArcGIS

I've got several GIS datasets for a national park in South Africa (elevation map, water points, elephant density and such). I have access to the full ArcGIS Desktop Advanced suite, but am no GIS ...
5
votes
3answers
3k views

Misplaced Google Maps with OpenLayers plugin in QGIS?

I was using Google Maps with OpenLayers plugin in QGIS with my vector layer with projection EPSG:4326 with google map projection EPSG:3857 and "on the fly" transformation enabled. It was matching ...
1
vote
1answer
1k views

Converting local Coordinates to lat/long Coordinates using QGIS?

I'm using QGIS to do some data analysis and visualization for my newspaper and I'm a basic/novice user at all this. I received some x,y coordinates from the City of Minneapolis that I can use to ...
0
votes
1answer
89 views

How to re-reproject coordinates that are coming from GeoServer

I have a GeoJSON as follows: ...
2
votes
0answers
210 views

Longitude and Latitude Mixed Up on Map

I am trying to map a WFS layer with data originally coming from a PostGIS table, and using a OpenLayers 3. At some point in this process, I believe the longitude and latitude coordinates are getting ...
2
votes
1answer
149 views

J2000 to WGS84 in QGIS?

How to transform Earth-Centered Inertial J2000 CRS to WGS84 CRS in QGIS? I searched J2000 in spatialreference.org, however nothing found. I don't know the proj4 string of J2000. Any advice would be ...
0
votes
1answer
40 views

Will Processing without a Spatial Reference cause Issues?

I was given a bunch of ASCII files that I needed to convert to raster and then create maps from. For some maps I had to do a simple difference calculation between two rasters (did this in ArcMap). ...
1
vote
3answers
228 views

ArcMap get coordinate system

How can I get current coordinate system type from opened file? I tried var coord = ESRI.ArcGIS.Geometry.esriSRProjCSType.... ???; Can you tell me, what should I do? UPD: I need to save current map ...
2
votes
1answer
183 views

Coordinate display in Terrasync

I'm using Terrasync on a Trimble GeoXH 6000 - set for WGS 84 and UTM. It acquires satellites fine, but instead of displaying my current location in UTMS, the skyplot screen shows "12RVU" and then a ...
0
votes
0answers
175 views

How to create a map in Pulkovo 1942 with grid?

I have a problem with coordinates when I change projection. With WGS 84 it's fine, I have normal, geographic coordinates. But when I'm changing to Pulkovo 1942 (I need a map of Poland), coordinates ...
1
vote
1answer
109 views

How to get spatial reference in ArcGIS Server identify response

I'm using the ArcGIS API for JavaScript to query features in a web map. After sending an identify request to my ArcGIS Server 10.2.2 Map Service (added as ArcGISDynamicMapServiceLayer, the response is ...
1
vote
1answer
80 views

Why does ArcGIS Online project my files right where they should be but, ArcGIS for desktop does not

When loading shapefiles into Arc Map 10.2.2 I get the message saying "unknown spatial reference", then my files are not projected where they should be and are usually too small to see regardless how ...
3
votes
2answers
374 views

Convert a grid file from one set of coordinate systems to another

I have a grid file in a certain coordinate system. I'd like to change it so I have the same grid in geographic lat/long based on WGS84. This seems like something that gdal can tackle quite easily ...