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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25 views

Reverse Engineering some integers

To begin, I didn't know a DATUM from a UTM when I started researching this, so take it easy. ;-) I was poking around some maps downloaded by an iOS app (iHikeGPS) and the filename's were encoded with ...
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28 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 ...
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1answer
25 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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17 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
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1answer
42 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 ...
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8 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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26 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 ...
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1answer
25 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? ...
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16 views

Fictional flat map in Google Earth/Leaflet with custom CRS [closed]

I see a few other posts on the topic of fictional maps, however none seemed to address my specific case. I'm attempting to recreate a fictional game map to work with Google Maps or a mapping UI ...
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27 views

Trying to convert GPS LatLng Android coordinates to use in ArcGIS rest - esriMeters

I am getting the LAT and LNG position from Android. Both values are of type double, in Degrees. For example: NY, USA Latitude: 40.7142700 Longitude: -74.0059700 Then I have a service ArcGIS REST. It ...
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1answer
43 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 ...
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6 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
22 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 ...
2
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1answer
81 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 ...
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1answer
17 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 ...
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2answers
63 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 ...
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0answers
30 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 ...
3
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1answer
28 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 ...
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2answers
26 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 ...
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1answer
50 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 ...
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1answer
42 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 ...
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2answers
147 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 ...
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0answers
33 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 ...
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0answers
30 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 ...
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1answer
9 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 ...
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1answer
62 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 ...
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2answers
56 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 ...
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1answer
21 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 ...
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1answer
25 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 ...
3
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1answer
94 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 ...
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26 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 ...
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0answers
18 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
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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 ...
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0answers
29 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 ...
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1answer
33 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 ...
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3answers
67 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
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1answer
56 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 ...
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31 views

Coordinate system conversion

What is the equation to convert NAD 27 and MINA NAD 27 coordinate system to WGS84 coordinate system?
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1answer
38 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 ...
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1answer
32 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 ...
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2answers
101 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 ...
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1answer
52 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
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3answers
160 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 ...
0
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1answer
44 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 ...
2
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1answer
48 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 ...
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1answer
43 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 ...
2
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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 ...
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3answers
85 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 ...
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1answer
54 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 ...
2
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1answer
33 views

Adjusting extents so that same-CRS shapefiles overlap in QGIS?

I have two files with identical projections/CRS. Using both OTF on & off I cannot get them to overlap: one shapefile contains coastal polygons of Massachusetts, and the other shapefile contains ...