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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30 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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1answer
82 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
25 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 ...
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0answers
34 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 ...
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1answer
692 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
46 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
153 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
3k 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
115 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
33 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
365 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 ...
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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
44 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
72 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
114 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 ...
0
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1answer
137 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 ...
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2answers
893 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
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1answer
94 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 ...
4
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1answer
66 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 ...
5
votes
1answer
93 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 ...
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2answers
548 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 ...
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1answer
854 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
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2answers
4k 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 ...
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1answer
120 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 ...
3
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1answer
482 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 ...
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0answers
50 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
92 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 ...
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0answers
154 views

Converting coordinate notation from GDA94 to WGS84 gives ERROR 999999?

I am trying to convert my data from GDA_1994 to WGS_1984 using the 'Convert Coordinate Notation' tool from ArcToolbox. I used the import XY data tool to import my csv file with x,y fields (among a ...
3
votes
1answer
133 views

Using Cassini-Soldner projection in QGIS?

I have a shapefile in a Cassini Soldner reference system centered in Monte Mario (Italian cadastre map). I want to insert these data inside QGIS in order to compare data with aerial images. When ...
0
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0answers
23 views

ISO 3166-1 + ISO 3166-2 data plus lat long border data

Could anyone please be so kind and point out a commercial/reliable source of up to date ISO 3166-1 + ISO 3166-2 data plus lat long border data?
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0answers
34 views

How to extract the raster files from .prj?

I am interested in using Raster Calculator tool for which i need the desired raster files. But i came across a problem i.e. when i converted my vector files to raster and saved them they were saved ...
0
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1answer
157 views

What's the formula for converting SWEREF99 to WGS84

I have a few hundred rows of data with sweref99 coordinates that I want to plot using Fusion Tables on Google Drive. What formula can I use to convert the two columns of Sweref99 x and y coordinates? ...
9
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2answers
19k views

How much is 1 meter in decimal degrees?

I am using FME's Tester to select objects that are bigger than 1 meter. My data are in EPSG:4326. How much is 1 meter in decimal degrees?
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1answer
82 views

Difference between WGS_1984_UTM_33N and GCS_WGS_84

What is the difference between: a map that has a projected coordinate system of WGS_1984_UTM_33N, a geographic coordinate system of GCS_WGS_1984, and a datum of D_WGS_1984 a map that has no ...
6
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3answers
698 views

Using PROJ.4 library to transform from local coordinate system coordinates to global coordinate system using ground control points?

I have a point cloud whose coordinates are with respect to a local coordinate system. I also have ground control points with GPS values. Can I convert these local coordinates to a global coordinate ...
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0answers
12 views

Missing importfromURN method in gdal java wrapper

The java wrapper of gdal doesn't have the method importFromURN, and I want to use the projection system which is specified in the URN string format. Is there a way in which I can do that? Maybe I can ...
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0answers
47 views

Are there any conditions that could break the creation of an arcpy.Polygon object?

I have a script that generates a mesh network from vertex and centroid inputs, and it works for almost all my points. But for some records that get created in the feature class via the script, their ...
8
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1answer
1k views

Getting units from ISpatialReference of ArcObjects?

How do I get the units (meter/feet) from an ISpatialReference object in ArcObjects?
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2answers
83 views

Display a WFS service with OpenLayers 3. Define an add custom projection

I am new in OpenLayers 3. I am working with GeoServer 2.6.2 and I would like to create a web mapping with OpenLayers 3. I am working with a custom projection from El Salvador (Central America). It is ...
0
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0answers
27 views

ArcGIS Online no spatial reference

My intention is to georeference an image so as to create a Swipe Map in AGOL. First, I add my control points, rectify, then analyze before attempting to share and finally publish in AGOL. The other ...
1
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2answers
148 views

How to overlay a Lat/Long CSV and NAD83 Shapefile in QGIS?

For reference I am new (as in a few hours of messing around) to GIS. I have a shape file/accompany projection files ect: CURRENT.prj CURRENT.shx CURRENT.shp CURRENT.dbf CURRENT.sbx CURRENT.sbn I ...
2
votes
1answer
309 views

Convert coordinates to differnt Spatial Reference System in Python

I am trying to convert co-ordinates (-33.75, 150) from epsg:3857 to epsg:28356 in Python. Using both of the examples in post How to convert projected coordinates to lat/lon using Python?, I get the ...
10
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3answers
7k views

How to convert projected coordinates to lat/lon using Python?

I assume this is a basic question but I can't seem to find or recognize the solution. This site returns Point: X: -11705274.6374 Y: 4826473.6922 when you searching with the first key value of 000090 ...
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3answers
823 views

PRJ file for Stereo70 S-42 projection?

I receive lots of Romanian maps with the projection STEREO70 with Datum "S-42 for ROMANIA". I have only found the "Stereo 1970.prj" by ESRI, and when I open the maps with my GIS software the ...
3
votes
1answer
78 views

How to manually add spatial reference information for FEWS rainfall data in ArcMap?

I am trying to match rainfall data from USGS/FEWS to coordinate locations of survey households in Uganda, so I will need to be able to project the rainfall data. So far, I downloaded the dekadal RFE ...
1
vote
1answer
57 views

Why did my data points shift position?

Here is an example of my issue: There are two point layers displayed in this image: The yellow dots are my currently used layer with the most updated data. The green dots are legacy data from when ...
1
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1answer
78 views

Shapefile doesn't fit in CartoDB basemap

When I import some shapefiles in CartoDB they don't fit properly at street level, as you can see in the screenshot. In this case, the shp was generated in QGis with CRS EPSG:29193 - SAD69. I have ...
2
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1answer
463 views

Define spatial reference of layer in ArcGis JavaScript API

I get an error "Map: Geometry (wkid: 3301) cannot be converted to spatial reference of the map (wkid: 4326)" when I want to add only graphics layer. I found that spatial reference for a map is defined ...
3
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2answers
158 views

methods for converting coordinate datum and format in python?

Related to an earlier Q&A of Missing grid shift files for cs2cs.exe? ... what are the various methods to convert coordinate datum and format in python? (Windows Vista, python 3.4) For example, ...
6
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2answers
315 views

QGIS area calculation differs when on the fly CRS transformation enabled

When I open QGIS, add the layer, and calculate the areas of the shapefile via field calculator I get a different area than when I open QGIS and check "Enable on the fly CRS transformation" and ...