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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10
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485 views

Geotransformation for polar stereographic?

I'm currently working to import CANGRID climate data (provided as Surfer Grid ascii, ".grd" files) into ArcGIS. The grid is 95 rows by 125 columns in size.Metadata provides lat/lon of origin (lower ...
4
votes
0answers
89 views

Adding data from PostgreSQL to Query Layer of ArcGIS for Desktop warns that given coordinate references are incompatible?

When adding data from PostgreSQL in a Query Layer I get the warning "The given coordinate references are incompatible" I have added many other layers with the same properties no problems, but I have ...
4
votes
0answers
301 views

Can GeoTools parse GML CRS definitions?

A kind of branching of this question. Soon I will need to handle GML Coordinate Reference Sysyem definitions in a Java servlet. Links: GML OGC reference. Concrete example. I know that GeoTools ...
3
votes
0answers
80 views

Is there a way to expose Spherical Mercator Lat Lon in Google Map API?

The map tiles in the Google Maps are in Spherical Mercator projection (srid 900913), but in the API the methods report coordinates in Lat/Lon WGS84, e.g. map.getCenter(). Is there a way to return the ...
3
votes
0answers
230 views

Hexagon binning using Google Maps

I have a bunch of geolocated points that I am looking to cluster on a google map using hexagons. These clusters will be stored in a db for quick retrieval and will be reduced to a single point and ...
3
votes
0answers
116 views

Unknown gridlines on old Greenland base map!

Can anyone help me out please? I'm using an old 1:10,000 base map of Greenland for a mapping project with nice 10cm gridlines already drawn on. However it uses a coordinate system which is unfamiliar ...
3
votes
0answers
66 views

How can I specify a spatial reference system which has a north pole different than the standard north pole?

I have a geographic spatial reference system (i.e., latitude and longitude) which has a north pole that is not the usual north pole: it's the magnetic north pole at approximately 70.30 degrees north, ...
2
votes
0answers
46 views

How to access Leaflet EPSG:3857 coordinates?

I read everywhere that Leaflet is internally using a spherical web mercator (EPSG:3857), but whatever I try I get either Lat/Lon (EPSG:4326) or strange coordinates I dont understand: ...
2
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0answers
92 views

Converting local XYZ to geographic coordinates

I am working with a computer program called PEP for Windows by Airbus, which is able to calculate exact flight paths of an aircraft, based on many inputs like weight, temperature, wind, etc. The ...
2
votes
0answers
36 views

How do I trick QGIS's map composer into chopping off the 000's in UTM coordinates?

In QGIS 2.8 (ubuntu), you can create a map with ticks and labels. I want the first two digits to be smaller sized, the next 3 to to be normal sized, and hide the last 3 digits. QGIS does not offer ...
2
votes
0answers
27 views

Error in Measuring distance using QGIS?

I am using the current Qgis 2.6.1 and having problems using the measuring distance function. The 'Measure Line' is giving me distances which is completely wrong and the scale shown was too big also. ...
2
votes
0answers
70 views

Problem when converting to LCC projection

I am very much so a beginner.. but here goes. I have two maps that should line up with each other, but their projections are different. I've tried to use the gdalwarp utility to match them up, but ...
2
votes
0answers
52 views

QGIS CRS correct, but layers appear warped

I am trying to overlay a raster Landsat 8 scene and vector scene boundary. Both are using WGS 84 + UTM48N. However, the vector (orange line) appears offset when overlaid on the raster. I have checked ...
2
votes
0answers
95 views

Mine Grid to UTM

I have been given spatial data (lidar) that was collected in mine grid feet in ASCII format. I am using arc to process but need to define a projection does anyone know how to do this or any other ...
2
votes
0answers
38 views

Reference and Beacon Stations in Vietnam

I'm not sure if this question can be asked in this forum, but here it goes. I am on my way to conduct some remote sensing research in Vietnam, which includes logging of coordinates. This should ...
2
votes
0answers
250 views

Returning distances in meters from Near (Analysis) tool of ArcGIS for Desktop?

I'm trying to write a python program that returns the distance from each point in a set to the nearest road. Specifically, I was looking for any points within 10 meters of the roads. Both sets of ...
2
votes
0answers
155 views

CRS problem: not recognizing the CRS of shapefiles to be the same for all

I'm attempting to aggregate (average) the attributes a point layer to polygon attributes (i.e. block groups and counties) via a spatial join. Both the points and polygons are in the same projection - ...
2
votes
0answers
664 views

ArcGIS WGS84 Web Mercator Vs. WGS84 UTM zone 15N: Very different distance dimensions

I am working in ArgGIS 10.1 with a field (raster layer in tif format) in which I have placed two points (.shp layer). I have two versions of both layers, resulting four layers: one tif+shp set in CRS ...
2
votes
0answers
144 views

How to get a native srs and declared srs of layer using gsconfig?

How we can get native SRS and declared SRS of existed layer in GeoServer? I'm getting up to layer name available in a particular store and work space. The code as follows from geoserver.catalog ...
2
votes
0answers
51 views

Is it safe to store coordinates on NFC tags always in one CRS and rely on conversion for others

I'm involved in NFC (Near Field Communication) standardization of a record structure for geographic point locations. That will allow to put coordinates on NFC memory tags which can be read with a ...
2
votes
0answers
548 views

Which of EGM96 geoid or WGS84 ellipsoid fits the earth better?

ImageCredit Question If we separately add up |H| and |h| over the earth surface, which of the sums come out smaller? Background There is a phrase in the tag description of "ellipsoid" that says ...
2
votes
0answers
111 views

coordinate system for calculating distance at the nation scale

I want to use ArcGIS 10.1 to calculate the straight (euclidean) distances from zip codes to their nearest city centers in about 300 U.S. metropolitan areas. I have two point shpfiles: one includes the ...
2
votes
0answers
20 views

arcmap envelope coordinates from webbrowser tool

So I have my own php file with textfields which I run in my add in. Now I want to get the variables from the textfields and automatically give the value of the textfields to my env.PutCoords(x,y,x,y) ...
2
votes
0answers
1k views

How do I change from lat/long to a metric coordinate system in GRASS?

Yes, it's yet another transformation question. I am working with ASTER DEM data, which is LatLong WGS84. I want to process the DEM map into an STL file for use in a CFD simulation. The script I am ...
2
votes
0answers
161 views

Height of the geoid in ECEF coordinates

I know that the relationship of geoid height N and ellipsoid height h to orthometric height H is defined by H = h - N, but what if I have some position in Earth-Centered-Earth-Fixed (ECEF) ...
2
votes
0answers
326 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 ...
2
votes
0answers
1k 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 ...
2
votes
0answers
530 views

Problem with Create Fishnet on a Landsat footprint

I have a Landsat footprint polygon shapefile that I simply want to create a 6 x 6 fishnet on. I thought this would be simple, but every time I run the tool I get a fishnet output that extends longer ...
2
votes
0answers
242 views

What's the difference between CRS 4326, CRS 4978, and CRS 4979?

CRS 4326, 4978, and 4979 are all based on WGS84. 4326 is called "geographic 2D" 4978 is called "geocentric" 4979 is called "geographic 3D" What are the differences between these three? And why ...
2
votes
0answers
208 views

How to decode Magellan URL coordinates to lat/lon

Magellan uses this URL to designate a coordinate in New York: mgn:///address/?coord=merwFvlqbM,name=Viva%20Herbals%20Pizzeria,number=179,street=2nd%20Avenue,city=New%20York,country=US How can I ...
2
votes
0answers
105 views

When using OpenLayers plugins maps, can I have Longitude/Lattitude labelled on my grid when using the Map composer in QGIS?

Using OpenLayers plugins maps, can I have Longitude/Latitude labelled on my grid when using the Map composer in QGIS?
2
votes
0answers
130 views

Changing CRS crashes QGIS every time

When I open QGIS, and use the tools, setting -> project properties, QGIS will crash. When I also use the setting -> option -> CRS , Select new CRS also causes a crash. It looks like couldn't use the ...
1
vote
0answers
14 views

Text box with automated coordinate reference system in use on Qgis

Using an expression, is it possible to automatically fill a text box placed on the map (in the composer) showing the reference coordinate system of the project? If possible, how would that expression ...
1
vote
0answers
20 views

problem with view of open layer plugin map and swiss national coordinate system in print composer

Mi projects are in the swiss coordinate system (CH0193+ / LV95) and I use Open Layers Plugin for the base map (google streets). In the normal window, this seems to work fine: As soon as I open ...
1
vote
0answers
21 views

Projected CRS interfering with Spatial Analyses?

I have come across a problem I am very puzzled about. I am working with two polygon shape files, one of which is a buffer around the other, and a point shape file in a project set to EPSG:54016. All ...
1
vote
0answers
6 views

NBI Coordinate Data Missing place-holding zeroes for DMS format

When working with National Bridge Inventory (NBI) coordinates I have found what appears to be an error in the raw data provided. I couldn't find any other mention of this specific error when ...
1
vote
0answers
31 views

Schematic Map in GIS Tools?

The Question: Is there way to leverage GIS tools to author/edit a schematic map where elements' geometries has canvas-based coordinates rather than real-world coordinates on Earth? Perhaps to ...
1
vote
0answers
22 views

Integrating New Coordinate System as Default in ArcGIS for Desktop?

I have a database in Postgres whose Coordinate System is a local one. I mean it is not defined as default in ArcGIS 10.2 for Desktop. On the other hand I have ArcGIS with SDE working over Oracle. ...
1
vote
0answers
37 views

Query all Object within n kilometer Radius with Hibernate Spatial?

I use hibernate spatial attach a geolocation to a car. My card domain class looks like this: import com.vividsolutions.jts.geom.Point class Card { String name Point location } My program is ...
1
vote
0answers
38 views

rasters written with gdal show up with units of meters when they should be degrees

I have some SMOS soil moisture data packaged in a netcdf format distributed by "cp34-bec". I have been able to use GDAL to extract this data as a raster layer, using a projection i think is ...
1
vote
0answers
28 views

Projections way off on data imported into QGIS?

I have elevation data as a .shp from the USDA ARS and Hi-Res Orthoimages (Mystery Projection (UTM 15N?)) from the USGS website as geoTIFFs (plain NAD 83). I am trying to project all of the images ...
1
vote
0answers
57 views

Georeferencing reversal of image

I georeferenced a map and it posted to canvas as a mirror image of the original map. I set my project CRS before starting and also made sure to set the same SRS for the Geotiff being created and ...
1
vote
0answers
46 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 ...
1
vote
0answers
50 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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vote
0answers
49 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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0answers
47 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?
1
vote
0answers
61 views

converting coordinate/reference system on IDRISI Selva

i had converted my shp.coordinate/reference system from plane to UTM 48S in IDRISI Selva by change it directly at its layer properties. And after, theres message said that the changing is only for ...
1
vote
0answers
58 views

Reproject before a Spatial Join

I have one polygon file containing all German municipalities as well as a point file. For each municipality, I would like to compute the average of a certain attribute of all points within the ...
1
vote
0answers
75 views

ArcGIS Server WMS URL Syntax Incorrect

Having a strange issue consuming WMS services hosted on ArcGIS Server 10.3. When the service is cached in ESRI's compact format, the request fails with HTTP 400. In exploded format, it works ...
1
vote
0answers
50 views

Which projection should be chosen to model transmission lines across the USA?

I am looking at different options for high voltage power lines in the US. These power lines cross several states. Since in the end the distance is of importance, is the USA Contiguous Equidistant ...