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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2
votes
0answers
25 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 ...
2
votes
1answer
390 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 ...
1
vote
0answers
23 views

Identify coordinate system used near Kuala Lampur

I have some coordinates that were given to me, and I do not know much about how they were taken. I thought they were UTM coordinates, but when I try to convert them using some online tools I always ...
1
vote
0answers
23 views

Conversion of (lat, lon, height) from GPS to another CRS

I have latitudes, longitudes and ellipsoidal heights derived from GPS readings, referenced to the ITRF08 system with vertical datum (CGVD2013) - http://webapp.geod.nrcan.gc.ca/geod/hmod/hmod.php How ...
1
vote
1answer
41 views

How to upload GeoJSON to CartoDB in a CRS that is not lat/lon?

I'm pretty sure I need to convert the coordinates in my GeoJson file to EPSG:3857 for them to play nicely with CartoDB, but I don't know what coordinate system they are currently in. The original data ...
1
vote
1answer
8 views

Geosoft Oasis Montaj Local Datum Transform - What is the purpose of this parameter?

When defining a coordinate system in Oasis Montaj one of the parameters is "Local Datum Transform". Is this the coordinate transformation definition to convert the defined coordinate system of a data ...
2
votes
1answer
476 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: ...
1
vote
2answers
44 views

Plotting points using coordinates from excel [duplicate]

I have an excel spreadsheet with co-ordinates (eg. S31 07 35.3). I would like to use these co-ordinates in arcmap (version 10.2) to plot points based on these coordinates. How do I go about doing this ...
1
vote
1answer
16 views

Change Projection

I am a little bit lost here. working in QGis 2.8, OS X 10.10. I have a polygon shp in the CRS EPSG: 21781, CH1903 / LV03 and a point file in EPSG: 4326, WGS84 How would I work with these ...
5
votes
1answer
84 views

Getting weird lines in Print Composer QGIS

I am working with QGis 2.8 and want to use the print composer to create a jpg image. I used this PlugIn (https://github.com/jdugge/ClipToHemisphere) to create the globe. The graticules I created the ...
0
votes
1answer
118 views

Proper transformation file to go from NAD83 CSRS UTM 17 to NAD83 UTM 17

Looking to determine which transformation file to select when using the Project tool in ArcMap 10.2.2 to go from NAD83 CSRS UTM 17 and NAD 83 UTM 17. The data I am working with is from Geogratis and ...
0
votes
1answer
20 views

Unable to export Projected layer [UTM] to Google Earth from ArcGIS for Desktop?

When tried to export any vector layer in ArcGIS [projected in UTM] to Google Earth, it is falling away from the actual location. However, when I export vector layer in Geographical Coordinate System ...
0
votes
1answer
34 views

How to add spatial reference ESRI:102100 as a custom CRS to Geoserver?

I've been struggling with this for over a week. I'm using the ArcGIS Javascript API to create a basic map application, and I'm trying to add a WMS layer from my geoserver to this application. The ...
1
vote
3answers
58 views

ArcGIS Javascript API - How to define spatial reference for WMS layer?

I'm just starting with the ArcGIS Javascript API, and I'm having some issues adding layers from my geoserver to my basic map application. I started with the WMS resource info sample from the ESRI ...
3
votes
1answer
90 views

Obtaining length of non projected feature (gcs_wgs_84) in meters instead of decimal degrees?

I could not find a post which answered to my problem and I hope I didn't miss it, in case I did I apologize. I'm working with Arcgis 10 and I have a multiple lines feature with gcs_wgs_1984 ...
0
votes
0answers
20 views

How to get changed spatial reference of any layer in ArcMap using ArcObjects?

I have several layers in arcmap. I can access these layer's spatial references too. But if user changed one of spatial reference properties(eg. name, central_meridian etc.)of any layer, then how can I ...
0
votes
0answers
8 views

Real-world dimensions of a 3D object in VisualSFM or MeshLab

I have a good-quality, precise 3D scene reconstructed from photographs/video by VisualSFM. All camera parameters, including 3D position and lens details, are known. Now, that the hardest work has ...
0
votes
1answer
43 views

Measuring areas in WGS 84 [duplicate]

I started a QGis project with adding information layers from OpenStreetMap such as the streets and railways for a city. This data has WGS 84 CRS. After that, I made a shapefile with urbanized bodies ...
0
votes
0answers
64 views

How can I define coordinate system of feature class when overlaying with coordinate zone shapes in python?

I have generated bounding boxes for CAD drawings that do not have defined coordinate system files. I know that each drawing could be in one of 6 different systems that do not overlap. My idea was to ...
7
votes
2answers
368 views

Why are heatmaps on qgis 2.8.1 produced in the wrong CRS?

I noticed that the heatmap calculation on the new upgrade version of qgis is given the raster map without any coordinate system. Have you got the same problem?
1
vote
0answers
26 views

ESRI/Mapinfo MGA56 prj vs QGIS MGA56 prj

I am trying to understand why the degree unit is different between ESRI/Mapinfo and QGIS: ESRI/Mapinfo ...
3
votes
3answers
137 views

Which projection is best for mapping the contiguous United States?

If I wanted to project latitude & longitude data for the contiguous United States (the United States excluding Alaska and Hawaii), which projection would I use? I prefer more accurate distances ...
1
vote
3answers
66 views

Project only required shapefiles in folder

I have 8 shapefiles in a folder with shapefile 1 and 8 in the same projection and the others (shapefile 2-7) if different projections. Is there a way to use python to use shapefile 1 as the ...
1
vote
1answer
31 views

How to know spatial references of two layers are same?

I have two layers . Now I want to say that the spatial references of these layers are same or not .. I am using .Net technologies in arcmap. I have successfully got spatial reference information ...
1
vote
1answer
51 views

Georeferencing Old Mining Maps (Floetzkarte des Oberschlesische) in QGIS?

I am trying to georeference some old mining maps (Floetzkarte des Oberschlesische) in QGIS 2.9. I have already tried to do that by marking known points on present satelite photos, but the results were ...
2
votes
1answer
118 views

Translate coordinates between different CRS

There are two Coordinate Reference System, say they are wgs84 and crs2(a local crs). A certain location can be translated from wgs84 to crs2 by official algorithm, and the algorithm is ...
5
votes
2answers
1k views

Does anyone know the proj4 Coordinte Reference System command line for Rectangular Polyconic Gores?

I am a GIS beginner using QGIS 1.8.0 I am trying to transform a world map from the standard WGS84 Coordinate Projection System to a set of rectangular polyconic gores, with a gore count of 12. ...
-2
votes
0answers
31 views

Coordinate system conversion

What is the equation to convert NAD 27 and MINA NAD 27 coordinate system to WGS84 coordinate system?
0
votes
1answer
33 views

Convert WGS-84 position into lat/lng

I am using leafletjs. I have a list of "WGS-84" positions that look like: LATITUDE N45 52.1096 LONGITUDE W125 52.4665 LATITUDE N48 24.1051 LONGITUDE E174 37.3832 What is the significance of the ...
1
vote
1answer
574 views

How does ArcGIS Desktop recognize WMS CRS?

I'm using ArcGIS Desktop 10 and working on a WMS service with Mars data. Currently the GetCapabilities shows <SRS>EPSG:4326</SRS>. I assume ArcGIS 10 reads this and therefore the WMS has ...
0
votes
1answer
27 views

Layers with the same projected coordinate system and geographic coordinate system do not overlap [duplicate]

I have a blank map, I've set the data frame to the same projected coordinate system as the data I'm going to add. I have added one shapefile and it looks good. When I wave the cursor over the map the ...
1
vote
2answers
93 views

How to identify, spatial references of two layers are same?

I have two layers. Polygon layer Polyline layer Now I want to check if spatial references of these two layers are same. How can I achieve this ?? In spatial reference there are many property ...
1
vote
1answer
50 views

Python - Projecting different shapefiles in the same folder

I have a few shapefiles in one folder with different coordinate systems but would like to use one of them as a template dataset. Is there a way to use python to filter out the shapefiles already in ...
3
votes
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 ...
1
vote
0answers
22 views

Wetterzentrale maps georeferencing - coordinate system?

I'm trying to georeference two maps from wetterzentrale in ArcGIS. In what coordinate system are those maps created?
6
votes
2answers
462 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) ...
1
vote
1answer
290 views

Haversine formula to calculate distance between real coordinates?

I need to calculate distance between two stations in a map in order to calculate empirical variogram in ordinary kriging to interpolate temperature data. Calculating distance in kriging using ...
4
votes
0answers
89 views

What projection system is used in China which is aligned with WGS84 [closed]

I have some GPS tracks in Beijing. I want to project it and convert the lat long degree values in meters for calculation in euclidian space. I was wondering what is the most suitable coordinate and ...
3
votes
4answers
4k views

WKID (Well Known ID) for national projection for ArcGIS REST API

I have to use my national projection system which does not have corresponding WKID listed for ArcGIS REST API. Without it I am unable to use this projection system for my web application. Any ...
3
votes
2answers
2k views

Convert GPS coordinate to ArcGIS x,y point?

I'm trying to plot some AGSSimpleMarkerSymbol's in a AGSGraphicsLayer. The issue I'm running into is that the data I'm starting with are GPS coordinates (lat/lon). I'm using AGSPoint to plot the data, ...
0
votes
1answer
47 views

Want positive Y to be downward (not upward) in OpenLayers3

I want to use OpenLayers3 simply to draw some shapes that I can inspect by panning and zooming. There would be no map backdrop since the data is not geographic in nature. The data holds the ...
1
vote
1answer
162 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 ...
2
votes
1answer
43 views

Excel worksheet for Coordinate transformation between EPSG:31467 and EPSG:25832?

for offline use I have been asked to provide a coordinate transformation worksheet in excel that converts between EPSG:31467 and EPSG:25832 and also WGS84. Has anyone any experience with something ...
1
vote
1answer
38 views

Set GPLinearUnit type parameter default based on input spatial reference (Buffer Example)

Within a .pyt python toolbox I'd like to have a parameter of data type GPLinearUnit get a default value based on an input Feature Class (FC). The standard Buffer (Analysis) tool works as a great ...
0
votes
1answer
49 views

Adding points defined by Latitude and Longitude to map using QGIS?

I have an OS map on which I want to display points defined by Latitude and Longitude, but the map coo-ordinates have values I do not recognise or understand. The image shows the map, with my first ...
16
votes
8answers
11k views

ArcCatalog complains that spatial references don't match between a feature dataset and a feature class that have the same coordinate system?

I have a feature dataset that is using the GCS_WGS_1984 as the geographic coordinate system. It includes a few feature classes. This feature dataset is itself in a file geodatabase that contains a ...
1
vote
1answer
122 views

How to convert Geographic wgs-84 to lambert (LCC_wgs 84 projection for a vector file?

I have one shape file with Geographic wgs-84 projection but i need to calculate geometry for that I tried to convert it into UTM projection system. As my data is of whole country so I can't give one ...
1
vote
2answers
139 views

How to manage the CRS of Open-Layers plugin in QGIS?

I am working with OpenLayers plugin in QGIS 1.8 but I am not sure on how should I manage thc CRS. The defaul CRS for Googles/Bing layers is WGS84/Pseudo Mercator (EPGS:3857) but I am not sure on the ...
7
votes
3answers
998 views

Is there a name for 0,0?

Is there a name for the latitude/longitude pair 0,0? On a graph, (0,0) is referred to as the "origin" but I'm not sure if that term also applies to the location 0,0 in cartography.
1
vote
1answer
176 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 ...