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
9 views

Transform from Lambert Azimuthal “old” to ETRS89_LAEA

I'm currently struggling to convert a small raster dataset with Lambert Azimuthal "old" projection : +proj=laea +lat_0=48 +lon_0=9 +x_0=0 +y_0=0 +R=6378388 +units=m to the projection EPSG:3035 ...
0
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0answers
11 views

How to project WRF data (lat/lon) onto ArcGIS maps

I have climate data generated using the WRF model, in lat/lon format (lambert conformal projection), in an Excel file. I'm looking to project / overlay this data onto a map of the UK using ArcGIS, ...
1
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1answer
200 views

Difference between Geographic and Projected coordinate systems?

What is the difference between a geographic coordinate system and a projected coordinate system?
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1answer
360 views

Polygon using ARCGIS API for javascript

I've polygon data as POLYGON ((1645481.0939999996 6124506.9885, 1645470.0473999996 6124473.5406, 1645475.7094 6124440.1391,1645481.0939999996 6124506.9885)) in wkid=2193 I want to project ...
12
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1answer
9k views

Which is correct projection in ArcGIS Server for EPSG:3857/900913?

I want to publish a mapservice in ArcGIS server, which will be overlayed on Google Maps or Bing Maps. For this, the Map Service needs to be in EPSG:3857/900913. The Google Maps projection is supposed ...
3
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1answer
50 views

Local Ortho projection to Proj4

We are trying to use proj4 to project a local coordinate system to EPSG4326. We believe we have most of the string created correctly in QGIS and as follows; +proj=ortho +datum=WGS84 ...
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0answers
14 views

Why do GRASS' NC dataset and USGS' CONUS dataset coordinates disagree?

In the course of trying to figure out a specific data extraction task, I'm trying to understand the coordinate system used by GRASS. For a while, I'd been working with elevation data near Raleigh, NC, ...
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1answer
186 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, ...
11
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1answer
885 views

How to define Winkel Tripel in proj 4.8.0?

I have QGIS with proj 4.8.0 installed. I'd like to add Winkel Tripel projection which seems to be defined as +proj=wintri But that definition string does not work. Is this a bug in my proj version, ...
0
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1answer
128 views

Determining unknown Coordinate System using QGIS?

I'm trying to figure out the coordinate system of some data I downloaded from a no-longer-maintained USDA website. The data's still accurate, it's just floating in space. I've tried several ...
1
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3answers
52 views

Best projection / CRS for short-distance based analysis?

I'm having a bit of meltdown about projections and coordinate reference systems, and was hoping for a few pointers. I have 3 GIS projects, at 3 sites in Europe (the largest of which measures about ...
0
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0answers
14 views

R to ArcMap, erroneous change of spatial reference

I have SPOT5 imagery from Northern Sweden / Finland. Data is downloaded from SACCESS service and is provided in Sweref99 TM projection. When opened in ArcMap the data is shown in Sweref99 TM as ...
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0answers
25 views

What is coordinate system of US 1990 census tract data

I would like to set coordinate system of US 1990 census tract data using ArcGIS for Desktop. Do you know how I can do this?
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2answers
230 views

Add custom CRS - 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
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1answer
42 views

Project a set of coordinates - points from an excel into a shape file with unknown coordinate system (map-match)

I am trying to project a set of coordinates (points) from an Excel spreadsheet, on top of a shapefile (map) with an unknown coordinate system. The Excel file was created by first creating a map with ...
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0answers
18 views

Table to ellipse not working properly

I have a point shapefile with fields major_axis, minor_axis, azimuth, POINT_X and POINT_Y. There are values in those fields. I run Table To Ellipse, it goes without errors but what i get at the end is ...
0
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0answers
17 views

Converting coordinate system of feature layers and datasets programmatically

I am trying to convert coordinate system of featurelayer and datasets using ESRI.ArcGIS.DataManagementTools.Project . The tool works fine in ArcCatalog . I have doubts about the parameters i am ...
2
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1answer
426 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 ...
2
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1answer
522 views

PostGIS: ST_Transform function conversion problem

I'm inserting map data from a GML file with srid EPSG:27700 into a PostGIS database table with srid EPSG:4326. I'm using the ST_Transform function as in this snippet: ...
0
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1answer
18 views

ogr2ogr fails to process SRS definition [closed]

I try to import a shapefile to MSSQL server. The connection to the server is fine, but it seems that ogr2ogr cannot process the SRS definition. command: ogr2ogr -f "MSSQLSpatial" ...
2
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1answer
850 views

How to calculate grid convergence (True North to Grid North)?

I would like to know how to calculate the grid convergence angle between True North and Grid North for UTM maps. I am using ArcGIS 10.0 (ArcView licence) and have used the Calculate Grid ...
0
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0answers
143 views

I am getting NULL values when I use “point sampling tool”? [duplicate]

I am trying to extract values from a raster using a point shapefile, but I am getting NULL values. I think that NULL values are obtained because the Coordinate Reference System (CRS) are not the same ...
0
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1answer
624 views

ArcGIS Desktop, shapefile and EPSG code

Why a shape file with CRS WGS_1984_UTM_Zone_22N en Arcgis has a differrent prj file than the EPSG:32622:WGS 84 / UTM zone 22N WKT ? Can I replace Arcgis .prj file with EPSG:32622 WKT ...
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0answers
33 views

Distance Measure appears to be wrong in ArcGIS Desktop?

The distances in my shapefile are completely wrong. I got this shapefile online. Does anyone knows what's going on? I attached two pictures. The shapefile is projected as ...
1
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2answers
69 views

Setting coordinate system for image in ArcMap?

I am a beginner with ArcMap. I have a problem with setting coordinate system for my image. I am using an add-in which creates shapefiles .shp (craters, area), grids, plots and etc. However I get ...
4
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3answers
2k views

How to add points in degrees + decimal minutes to QGIS?

I try to add geocaches with x,y coordinates in a xls-table to qgis and convert to shp.file. Usally geocach-coordinates are like this: N 51° 29.440' E 011° 56.430' (WGS84) (in german its called ...
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3answers
66 views

What's the difference between EPSG:4326 and EPSG:36232?

I do not understand what these different EPSG's mean, even though they are both under WGS84. The way the latitude and longitude values displayed are different in both the cases when I try to change ...
1
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1answer
16 views

Difference between GCS_European_1950 and GCS_International_1924

In ArcGIS, there are two datums they look like same except their names; GCS_European_1950 and GCS_International_1924. Where I started to work, I found out that they are using both datums. Since they ...
4
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2answers
139 views

Difference between latitude and longitude

It occurred to me that latitude and longitude are not homologous in that the lines of latitude lie on parallel planes or slices through Earth, while lines of longitude are not parallel and meet at the ...
3
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1answer
1k views

Add MicroStation dgn to ArcGIS/ArcCatalog 10.1

I'm an iOS programmer but new to using ArcGIS 10.1. I'm having a problem loading my MicroStation dgn file to ArcCatalog. I've connected the folder containing my MicroStation V8i roadway design dgn to ...
0
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0answers
32 views

Rototranslation + scale of pdf and dxf with USER CRS in QGIS? [duplicate]

i have a map PDF or DXF to georeferenced with only rototranslation + scaling. I use EPSG: 32632, also the map that I need to import is a survey (maxmimal dimension 5000 m x 5000 m), but his coordinate ...
3
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1answer
29 views

Exporting BNG coordinates from MapInfo (27700) without rounding

I have a TAB file in ESPG 27700 projection and MapInfo is rounding Y coordinate values upon export. It also occurs when viewing the table (although selecting the value shows its 'true' form) Upon ...
1
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1answer
62 views

Extent is zooming map to 0,0 in ArcGIS API for Silverlight?

When I use this code (from the example): ESRI.ArcGIS.Client.Geometry.Envelope myEnvelope = new ESRI.ArcGIS.Client.Geometry.Envelope(); myEnvelope.XMin = -130; myEnvelope.YMin ...
1
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1answer
32 views

How to convert GDA eastings/northings to WGS84 lat/long in QGIS

I'm using QGIS to map weed locations and have a mixture of data from GPS, shape files of contours, OSM all in a project with CRS WGS84 (lat, long). I am trying to add in a shape file I have been given ...
2
votes
2answers
110 views

Can we no longer reference an ArcMap layer to get the spatial reference?

I'm currently using ArcGIS 10.2.1. In previous custom geoprocessing tools, I've used the following code to create a feature class in-memory, and set the spatial reference using an existing layer in ...
0
votes
1answer
75 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 ...
0
votes
2answers
715 views

I get an ERROR 000622 when it checks for arcpy.DefineProjection_management

So the purpose of my code is to create a loop that copies shapefiles from a folder to my folder and change its projection 'GCS_WGS_1984'. Each shapefile starts with the year follow by the month and ...
3
votes
1answer
43 views

How to convert Chinese Beijing 1954 coordinates to WGS84

I have a series of coordinates for locations in Sichuan Province China that I need to convert so that I can use them in Google Earth. The coordinates are "1954 Beijing coordinates system" and show up ...
1
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0answers
21 views

How to interpret BUFR descriptors

I'm processing BUFR products from Eumetsat and I would like to ask for your help about the following descriptors: 002028 SEGMENT SIZE AT NADIR IN X DIRECTION 002029 SEGMENT SIZE AT NADIR IN Y ...
4
votes
1answer
36 views

Changing the projection transformation for a feature class after adding it to an mxd

Is there a way to select a different projection transformation after you've added a feature class to an mxd? I have a pretty complex mxd set up to use as a map service where the original data is in ...
4
votes
1answer
59 views

If Geographic Coordinates are unprojected coordinates, how can GIS softwares display such unprojected data on a plane?

I have been using ArcGIS and QGIS regularly for about 2 years now, and just recently I was struck by this new thought. If a data set in say, in ArcMap, has been georeferrenced with a Geographic ...
1
vote
2answers
463 views

How to best set up QGIS for GDA 94 zone 55 (Australia)

I am looking for help on the best way to set up QGIS for GDA 94 zone 55. (i.e. all the relevant settings etc.)[1.8 in lieu of 2.0] Am working off Garmin GPS/gpx data in GDA/UTM format (I accss this ...
0
votes
1answer
744 views

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

I have three shapefiles with undefined projection, but I know which one was used (Lisboa_Hayford_Gauss_IPCC). I need to first Define Projection. It works. I then need to transform it to WGS_1984, so ...
4
votes
2answers
3k views

How to calculate distance between two points with esri.geometry?

The function http://help.arcgis.com/en/webapi/javascript/arcgis/jsapi/#namespace_geometry/esri.geometry.getLength should calculate distances between points. When I am trying to calculate distance ...
0
votes
1answer
34 views

How to project WGS84 to Kertau RSO in ArcGIS Android

How do I make a conversion from WGS84 (longitude, latitude) to Kertau RSO using ArcGIS Android? I looking into this for my project. Am I looking at the correct direction? I have following points in ...
1
vote
1answer
175 views

How to reproject from Clarke_1880_RGS_Lambert_Conformal_Conic to ETRS_1989_LAEA?

I am unable to reproject Marseille shapefiles from Clarke 1880 RGS_Lambert_Conformal_Conic to ETRS_1989_LAEA. I know that Clarke is a geographic coordinate system and it has no datum. I have tried ...
1
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1answer
214 views

Tiled raster image to be placed in an OSM/ Leaflet.js map

I have a mapoverlay in a custom projection which I need to add as a layer to an Openstreet map within a website. Since I was not able to change the projection earlier, I decided to manipulate the ...
3
votes
1answer
436 views

Which Geographic Transformation to use for WGS_84 to D_Sphere?

I have a shapefile for world countries and I want to reproject it from GCS_WGS_1984 to Sphere_Eckert IV. However, it asks for Geographic Transformation; it says this is optional but it is required in ...
0
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0answers
34 views

Satellite Image of same projection system , do not overlap

I have two satellite imagery with same projection system i.e. QND_1995_Qatara_National_Grid as Spatial Reference and D_QND_1995 as Datum. Satellite Image A) Received in WGS84 and converted it to ...
0
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1answer
33 views

How to get projection data (.prj) of raster image using GDAL/OGR?

I start with a boundary shape-file (think U.S. states) in lat/long that I convert to some projection, and then rasterize the result as a .tif. What I need now are the raster coordinates of the ...