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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41 views

OGR: How to control the spatial reference of a layer?

I want to use a subset of a shape for a spatial filter. The filter returns 0 features which is unexpected. So I was checking the spatial references of the layers and one of them seems to have none. ...
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1answer
66 views

Images displaced in UTM

I recently received a collection of satellite images (GeoTiffs) and their indice. Originally, the indice came in a geographic projection (GCS WGS 1984) and the Geotiffs projected to the appropriate ...
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1answer
98 views

Is there a way to determine the datum used when all you have is a lon and lat?

I have a dataset of US intersections from 2011 that I'm going to be using in a project together with data based in WGS84. Included in the CSV file is a variety of fields two of which are the lat and ...
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0answers
158 views

Shapefile projection issue - layers not lining up [closed]

See below for screenshot. The purple rectangle should line up with the green rectangle in the top right (OpenLayers Google Physical layer) and the tan points. I was sent this shp and given the ...
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0answers
74 views

eVis-Plugin centers mapwindow on coordinate origin

I have a QGIS-project with layers loaded from a postgis-database and also some shapefiles. I use the eVis-Plugin to display pictures. The displaying is working fine but after clicking on the geometry ...
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1answer
988 views

Trying to convert coordinates from WGS84 Web Mercator Auxiliary Sphere to WGS84

I've been struggling with this for way too long now. I've got some data that was georeferenced in the WGS84 Web Mercator Auxiliary Sphere that should have been done just in WGS84. The Auxiliary ...
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2answers
98 views

Is it possible to change CRS without the .prj file?

I'm working with QGIS and trying to change the CRS of some maps. Is is possible to do it without the .prj file? Please let me know. Thanks.
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1answer
336 views

Leaflet: Container coordinates vs Layer coordinates?

What is the difference between map container coordinates and layer coordinates? From what I gathered, the map container coordinates are always relative to the map viewport, and while layer ...
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0answers
18 views

Definition and content for the concept Coordinate Reference Systems [duplicate]

I tried googling around to understand deeply in the concept Coordinate Reference Systems but it didn't explain enough and clearly. My question is what is "Coordinate Reference Systems"? The ...
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0answers
114 views

proj/pyproj converted coordinates offset

I'm using pyproj to convert some coordinates from WGS84 to OSGB36. When mapped out the converted and unconverted don't map to the same places on a map. The OSGB36 coordinates are mapped about 100 ...
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1answer
142 views

Changing the CRS of a shapefile

Im trying to convert shapefile from one CRS to another in QGIS. On the layer menu, I right click on the shapefile, save it as with other name and there I change the CRS to the desired one (WGS 84). ...
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4answers
178 views

Which UTM system do you recommend for Tamaulipas, Mexico?

I'm working with QGIS 1.8.0. Could anyone tell me which UTM system would be better to project a map of Mexico? There are too many to choose from. I have to convert my maps from WGS84 to UTM to do some ...
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1answer
116 views

Why is there an offset between reprojection results of ArcGIS and QGIS from PSAD56 to WGS84?

I did a comparison of file system PSAD 56 to WGS 84 with arcgis and qgis and the difference is 8 m, why is the difference? This is a points file (shape) and it is in UTM Zone 19S.
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2answers
80 views

Projection 27700 in the OpenGeo Suite SDK GXP

I have some data stored as UK grid references, they display just slightly off alignment on the map after I followed the OpenGEo EXP tutorial using these settings (below) however when I change the EPSG ...
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1answer
109 views

Not able to convert GPS coordinates received from a software into Latitude and Longitude

I am working on a software which returns GPS coordinates in this format: Lat : '48684499' Lon : '5203474' I can not understand what type of coordinates are these and not able to convert them into ...
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1answer
158 views

Conversion from NZMG to latitude and longitude

I want to convert NEW ZEALAND MAP GRID coordinates i.e. Northing and Easting into WGS84 coordinates i.e. Latitude and Longitude. I have searched on internet but there is no proper explanation of how ...
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0answers
32 views

Change ShowCoordinates format to WebMercator

I would like to extend ShowCoordinates behavior to show the coordinates in WebMercator format. http://resources.arcgis.com/en/help/silverlight-api/samples/start.htm#ShowCoordinatesBehavior I tried ...
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0answers
131 views

PyProj/Proj4 convert geographic to projected coordinates for Geostationary Data

I am trying to convert geographic coordinates (in degrees east/north lon lat) to projected coordinates in meters for geostationary full disc data (GVAR Goes East data from CLASS). To do this, I tried ...
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1answer
333 views

Geographic Transformations using ArcPy vs. Coordinate Systems used by ArcGis online basemaps

I have 3 shape files with undefined projection, but I know which one it was used (Lisboa_Hayford_Gauss_IPCC). I need to 1st Define Projection. It works. I need to transform it from WGS_1984, so I've ...
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1answer
68 views

Why isn't enabling on the fly projection reflected in raster? QGIS 1.8.0

I have imported a map from the Ordnance Survey Open Data website. It is a 50k Street View raster. I have also created a new shapefile layer in which I have created a polygon overlay for the raster ...
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2answers
212 views

Transforming a google maps overlay to fit a Ordnance Survey projection

I am currently in the process of creating a map with some administrative boundaries on it. The base map I am using is an ordnance survey map 1:10000. I downloaded an administrative border as a .kml ...
2
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1answer
66 views

Why do edits made in attribute table not show in associated layer? QGIS 1.8.0

I have compiled a heat map layer to display over a background raster map. I discovered that the heat map layer was incorrectly positioned because I had made an error in the coordinate entry fields of ...
2
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1answer
239 views

How do I get the coordinates of my data frame always in long/lat?

I want to determine the coordinates of my current data frame. To do so I wrote this script: def DataFrame (): mxd = arcpy.mapping.MapDocument("CURRENT") df = ...
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0answers
49 views

Dateline wrap issue in ArcObjects / ArcGIS Engine

I am having issues manually creating a polygon that crosses the dateline (long=180). My x coordinate goes from 178, 179, 180, -179, -178, etc. Anyway, can anyone give me some guidance? I am using ...
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1answer
49 views

Converting an Experian (Geoconcept) file to GPS coordinates

I'm working with a file containing Experian data which was used in Geoconcept. The file describes a serie of microzones, that is polygons. Unfortuntely the coordinates system is hard to understand: ...
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0answers
269 views

How to set Scale Factor for Lambert Conformal Conic (LCC) projection in ArcGIS Desktop?

The projection for my state according to my country's Mapping Agency is in a specific Lambert Conformal Conic (LCC) projection. They have given values for the following parameters: False Easting ...
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1answer
85 views

Converting NEAR results to Meters/Kilometers?

I am having trouble figuring out how to convert the units from the results of my NEAR calculations. I want to convert them to meters or kilometers, but cannot figure out how to do so... ...
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2answers
123 views

PCS and GCS Transformation

Trying to trasnform GCS_Bessel_1841 PCS_Trasnverse Mercator (central meridian 18) to WGS1984 using "Project tool" in ArcGIS 9.3. I tried to do it in several different ways, every time from the ...
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1answer
403 views

From Bessel 1841 to WGS 1984

I am having problem with projecting my counties which are in GSC_1841/Hermannskoegel to WGS_1984 in ArcGIS 9.3. I tried the basic "project" with importing the existing coordinate system but that's ...
4
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2answers
107 views

How to translate WIGeoEU projection from ArcGIS to Qgis?

I have a Layer with this projection in ArcGIS: ...
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0answers
89 views

Assign spatial reference for 1000 different ECW raster datasets using 1000 different *.prj files through python programming or .net

I am having 2000 ECW raster datasets without spatial reference and also I have 2000 *.prj files in another folder. I know only the way as right click on raster datasets-->properties-->Spatial ...
3
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1answer
392 views

Setting coordinate system in PostGIS

The geographical information data that INEGI (part of the Mexico's goverment) provides are in the following coordinate system (or is projection?) Lambert Conformal Conic, double standard parallel ...
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1answer
111 views

Changing from one coordinate system to another without re doing

I'm new to this. Can I change from the Nigeria Mid Belt system to the Nigeria West Belt system easily, or do I need to recreate my project? Thank you!
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1answer
75 views

How to find the most east or west longitude around the date line

I've got a python script that is comparing extents of rasters in various projections. Generally it works, but sometimes, especially when the rasters are global in extent or cross the dateline it ...
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0answers
94 views

Why does Append on large annotation layer give WARNING 000594: Input feature falls outside of output geometry domains?

I am trying to Append about 3,000,000 records in an annotation layer to another, empty annotation layer. I'm using ArcCatalog and I get the following error messages: WARNING 000594: Input feature ...
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0answers
65 views

Filtering features in Bounding Box made from lat long?

I have a feature data which is based on lat/long. To show on the map, I convert them to east/nort. When dealing with Bounding box, I am getting co-ords is east/north, so I am converting from ...
2
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2answers
131 views

Older British Geological Survey geology maps of Kenya; need complete projection information

I have several geologic maps of Kenya produced by the BGS circa 1993. Noted on each map is the following: Projection:-Transverse Mercator Spheriod:-Clarke 1880 (modified) That's great, but that ...
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0answers
74 views

Spot NDVI spatial reference system

I have a series of spot NDVI data for Australia and I need to extract some information from it. Unfortunately there is no spatial reference system attached to it. This is one example of the data (HDF ...
2
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1answer
105 views

Caching aerials in a different coordinate system

I have a strange problem to deal with caching of the aerials. All of our Aerials are stored in SDE in State Plane WKID-2237 (NAD_1983_StatePlane_Florida_West_FIPS_0902_Feet). But we are planning to ...
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1answer
190 views

Determining the Coordinate System of shapefiles

I have 8 shapefiles which have a common coordinate system but none of them have it defined i.e. "unknown" is written when I look in the properties dialog box. However, I can see the extent which I am ...
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0answers
121 views

How to define coordinate system and geographic transformation for a CAD drawing?

I am a GIS guy and I occasionally work with CAD files as well. Now I need to know how I can define a coordinate system and a geographic transformation for a CAD Drawing. According to ESRI: "You can ...
1
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2answers
116 views

How do I gather X and Y co-ordinate data from a vector grid overlay in QGIS 1.8.0?

I have overlaid a 10m x 10m grid onto a UK Ordnance Survey raster map. I have set both raster and vector maps to the same CRS, (OSGB 1936 British National Grid; ESPG:27700). I have a csv file ...
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3answers
1k views

How to project Google Earth KML files in ArcGIS so that they display properly?

I am sure my question has been answered in the past but I would really appreciate it if someone could help me with this... I have downloaded a KML point file from Google earth and I imported it into ...
0
votes
1answer
114 views

converting grid references to long/lat

If I import from a POST DB a set of points that are referenced by grid reference, will the long/lat decimal also be added to the file? or will I have to convert the points to long/lat myself? In ...
1
vote
1answer
157 views

Intersect line (LLH) with any LLH plane

I have a LLH (Longitude, Latitude, Height) point with an elevation angle and azimuth (actually it is a receiver point). I believe I can make a line with this information. What I want is to intersect ...
2
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2answers
225 views

Python script to read coordinate system of an input feature class? [duplicate]

How to read the coordinate system of an input feature class in python script. How we can use "Describe()" function and tool validator for that purpose
2
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1answer
272 views

extracting data from rasters using shapefile boundaries in r

I have a raster.stack of 8 environmental variables and a shapefile of Ecoregions for the southern U.S. files<-list.files(path='E:/Ecoregions Models/Border Bioclim/',pattern='asc', ...
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1answer
67 views

GCS_WGS_1984 Map in Esri Javascript

I created a dynamic map service in Arcmap and published to my server. The spatial reference used: GCS_WGS_1984. I used the javascript without basemap to display in a html. I cannot do a ...
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1answer
184 views

Getting SRID from prj file? [duplicate]

I've seen varying questions relating to this question. Except mine revolves around C#. I'm trying to validate that the projection I'm expecting matches what is in all the .shp files I'm reading. ...
6
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2answers
280 views

Google Maps for other planets

I have visited, but do not remember where, Google maps for the Moon and Mars (I think). I am wondering if anyone knows what you have to do to generate the necessary GIS data (coordinate system, etc) ...