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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4
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1answer
88 views

Equal area projections with different area results in ArcGIS for Desktop?

Using ArcGIS, I have to calculate areas of huge polygons all over the Pacific Oceans betwwen 20N and 30S. I have been trying different Equal-areas projections (Cylindrical and sinusoidal for example) ...
1
vote
2answers
98 views

Find unit of EPSG-Code

I need a way to find out the unit of an EPSG-Code (e.g: meter) from java (ogr, gdal, osgeo?) but any other approach would be fine as well. I want to do something like: if(epsg.unit==meter){ do ...
0
votes
0answers
42 views

Mapfish print v3 returns org.opengis.referencing.NoSuchIdentifierException when using custom CRS

I'm trying to print in CRS, which isn't defined by default. I added definition of this CRS to epsg.properties, restart application and tomcat7 but still getting Error while processing request: ...
1
vote
2answers
99 views

Can't get SRS from PostGIS using Proj4 text

I'm having a problem transforming a point from the Australian MGA UTM datum (eg MGA Zone 51 http://spatialreference.org/ref/epsg/28351/) to WGS84 using GeoDjango. I've narrowed that down to a problem ...
0
votes
1answer
50 views

What is the formula for converting from WGS84 to EPSG:3071 (Wisconsin Transverse Mercator)

I have GIS software that can do this conversion but I need to know the actual formula / math involved. I'm writing code and need to perform a single conversion (WGS to EPSG:3071) so using a library, ...
4
votes
4answers
10k views

Getting shapefile in right projection using ArcGIS Desktop? [duplicate]

I have an older map that I didn't create. I'm just trying to get everything to line up on it, and having a hard time. The data frame is in NAD_1927_UTM_Zone_12N, as are the point shapefiles (derived ...
5
votes
3answers
9k views

Using ArcMap, how may I convert a shapefile to use decimal degrees?

I have a shapefile that currently uses meters as the measure for its coordinate system, but the map framework I wish to use expects decimal degrees. I'd like to reproject my shapefile to use decimal ...
1
vote
0answers
38 views

Issues in projection while defining data frame extent by coordinates

I'm trying to set the following coordinates to a dataframe: custom_extent = {1:-87.678956, 2: -87.611652, 3:41.867129, 4:41.954932} where 1 is key for XMin, 2 is key for XMax, 3 is key for YMin, ...
2
votes
1answer
1k views

Generating Map Tiles for MGRS Grid Graticule?

I'm possibly a bit out of my league here, but ready to get my hands dirty. I want to generate map tiles for a MGRS grid graticule similar to http://tiles.mapbox.com/mapbox/map/afghanistan-mgrs. I ...
4
votes
1answer
3k views

Convert Gauss-Kruger to UTM

How to covert Gauss-Kruger coordinates to UTM coordinates with GeoTools java library? As I have figured out the location (zone, country) is important. I need the calculation for Slovenia.
2
votes
1answer
993 views

Reprojection from WGS to Slovenian Gauss Kruger in QGIS

I have gpx file (track) in WGS84 (EPSG: 4326) coordinate system from Garmin GPSMAP 62 which is right projected in BaseCamp and MapSource. When I save track as *.GPX and import it to QGIS and use ...
2
votes
1answer
52 views

NZTM: Add 10 meters to a coordinate

Say I have the coordinates: N: 5413457.7 E: 1528677.3 If I were to add 10 to the northing value would that make the new coordinates point 10 meters north of the original point?
3
votes
3answers
193 views

How to georeference a map in UTM / WGS 84 (geographic) to WGS84 / UTM?

I have scanned UTM WGS 84 toposheets, with a geographic grid. I want to georeference them in WGS 84 / UTM (therefore with UTM coordinates). Should I: Calculate the UTM coordinates from the ...
0
votes
0answers
57 views

Four parameter Helmert transformation using four points

I'm looking for an algorithm to calculate a Helmert transformation using four reference points. Plus, does anyone know how I can calculate the error once I've completed the transformation?
0
votes
1answer
36 views

Converting SWEREF99TM coordinates to the “standard” coordinate system (longitude and latitude)

I recently asked a question about a coordinate system in a file, and found out that it used SWEREF99TM, but I can't figure out how to convert those coordinates to the "geographic coordinate system". ...
2
votes
1answer
13 views

CRS dialog no longer opening

I'm new to QGIS, so supect this is trivial, but it has frustrated me for the last hour or more... Last week whenever I added a csv as a layer once I'd filled in the first dialog it automatically ...
2
votes
1answer
45 views

Is there a 1.5:1 ratio coordinate system?

I'm a student fairly new to using GIS. I am doing a college project on using ArcGIS to map virtual worlds (such as the continents in World of Warcraft). The game programmers used a custom coordinate ...
0
votes
0answers
114 views

How do I determine programmatically what values to add to the proj4js constructor for a CRS or SRS such that I can iteratively render proper overlays

I think this is primarily a GIS based question as far as for example: var crs = L.CRS.proj4js('EPSG:2154', '+proj=lcc +lat_1=49 +lat_2=44 +lat_0=46.5 +lon_0=3 +x_0=700000 ...
0
votes
1answer
60 views

ArcGIS Online & Mobile Apps Projection Support?

What is the level of projection/co-ordinate system and transformation support accross the ArcGIS Online family of apps ; ArcGIS Online Web Map Viewer (Desktop) ArcGIS Online Web Map Viewer (Mobile) ...
3
votes
1answer
135 views

Canadian Geodetic Vertical Datum of 2013 (CGVD2013)

"Natural Resources Canada (NRCan) has released the Canadian Geodetic Vertical Datum of 2013 (CGVD2013), which is now the new reference standard for heights across Canada. This new height reference ...
1
vote
2answers
101 views

Unknown spatial reference in “Create Fishnet” files

I am working on an unprojected dataset (lat/lon) on a WGS84 DATUM, and for that region I have used the "create fishnet" tool from "Data Management Tools" in ArcMap 10.2, in order to apply a grid over ...
1
vote
2answers
47 views

postgis - managing single dataset, multiple coordinate systems

I am setting up a forest inventory database that aims to store information about forest plot data from various countries. The current project is in Mozambique, others are in Laos, etc. Each project ...
3
votes
2answers
938 views

Coordinate system of a MODIS file to be introduced in GDAL for transformation

I am working on MODIS data using GDAL. When I extract coordinate system information of the files I got this: Coordinate System is: PROJCS["unnamed", GEOGCS["Unknown datum based upon the custom ...
1
vote
2answers
1k views

Changing layer extent to decimal degrees?

Using ArcMap or ArcGIS 10 ... In the photo below, you can see my extent is in meters while my projected coordinate system is in decimal degrees. How can I convert my layer extent to decimal degrees? ...
0
votes
0answers
81 views

Missing grid shift files for cs2cs.exe?

I'm trying to convert a coordinate to WGS84 degrees to NAD27 UTM on windows (vista 32 home basic), from python. I tried installing pyproj with no luck even after researching for a while; so decided ...
0
votes
0answers
930 views

How to represent clustering of geographical points on map in STATA?

I've plotted a map on STATA using user-written program spmap and have also obtained the grid for my space using spgrid program. Now I want to see where most of my data points are clustered on map. Is ...
1
vote
1answer
74 views

Why the Select By Location analysis calculates distance in a wrong way?

I want to select cities, which are within a distance of 200 km from my pre-selected city. However my result depends on whether I'm creating a buffer and use it to clip the cities (good result) or use ...
0
votes
0answers
19 views

Unable to execute the algorithm using SAGA LS factor

I tryed to calculate the LS Factor at SAGA, using a slope raster and the area raster, both at the same EPSG, and the error:Unable to execute the algorithm the error means something with the coordinate ...
1
vote
2answers
471 views

Openlayers Plugin, Project CRS and Grids in Composer

Apologies in advance for the potential for this to be a duplicate question, I've had a good look, and I can't see a solution thatI understand well enough to help me. I have my project CRS set to a ...
2
votes
2answers
46 views

Georeferencing a map image with no precise projection info

I am trying to georeference a map that has meridians and parallels etc. but no projected grid displayed. I can get the coordinates of the meridians/parallels fine, so georeferencing should not be an ...
2
votes
0answers
22 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
1answer
57 views

Questions about EPSG:6372

I'm using QGIS 1.8.0 and as CRS EPSG:6372 a projection for Mexico, defined by the Instituto Nacional de Estadística y Geografía (INEGI). I have the following questions: If I measure the minimum ...
0
votes
2answers
93 views

cannot get ArcGIS to project a shapefile

I am using ArcGIS 10.1 (SP1). I got a shapefile with polygons representing some features of the landscape in my study area. This file has been provided by a third party institution. The coordinate ...
1
vote
0answers
33 views

Max length for WKT name

First of all, sorry if this is obvious or stupid questions. I am not very familiar with geographic information system. My question is, is there max length limitation on WKT name? see the bold text ...
4
votes
3answers
581 views

Defining the appropriate Projected Coordinate System

I am a beginner at ArcGIS and have a technical question. I need to assign a projected coordinate system to my boundary/polygon data in order to calculate square miles. There are many to choose from. ...
2
votes
2answers
2k views

QPJ files on ESRI software

We have some GIS data, which was converted from AutoCAD dwg to TAB using mapinfo, then converted to shapefiles as that's what we are required to create. Editing the data fields was done in the shape ...
0
votes
1answer
61 views

Export KML from GeoJSON in QGIS and coordinates change?

I'm very new in this area. I have a geojson vector layer file, with coordinates like { "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 487677.2993499999866, 112018.26101 ] } }, ...
0
votes
2answers
61 views

Spatial Reference Conversion

I am currently having some problem with the spatial reference projection on the map in Android. Basically I have a base map which is OneMap and all the coordinates stored in database is in SVY21 ...
1
vote
1answer
148 views

Map Spatial Reference

I was having some trouble when trying to zoom to certain point in ESRI base map. So basically I got an ESRI base map and added a map overlay on top of it: function setMap() { function init() { ...
4
votes
2answers
444 views

How to efficiently project datasets of varying coordinate systems into one coordinate system?

I am working on streamlining data processing at my organization. Currently we are using various large-scale Models that we will gradually bring into Python. The gist of our data processing is as ...
0
votes
1answer
23 views

Expand zone 33X

I have coordinates in DDD MM.MMM Lat N80 45.00 Long E028 55.00 I want to convert these to UTM. Using a web converter i get 35X E534389 N8965867 So far so good. But I have seen these coordinates ...
2
votes
1answer
91 views

UTM Coordinate Mapping Across Zones

I am building an application that requires me to plot UTM coordinates on a chart using CSV data. I am given two UTM coordinates for each record, although I would like the application to handle zone ...
0
votes
1answer
108 views

Converting DEM in degree decimal to meter using ArcMap?

i am trying to make cell size of satellite image and DEM equal for Maxent. cell size of satellite image is in metric but DEM is in degree decimal. how can i convert DEM in degree decimal to meter ...
1
vote
2answers
58 views

Wrong projection reference in coordinate system - How can I modify the original coordinate system?

Working in Germany, where Gauss_Kruger is very often used (as well as ETRS1989_zone 32N), and trying to find out about WKID when I realised that on my machine, the projection reference of the ...
1
vote
2answers
894 views

Why do I get wrong length using STLength on MultiLineString?

I have 2 MultiLineString representing the a route (first is driving there and the second is the return way) . MULTILINESTRING ((34.787315938035292 31.318235314177119, 34.788431415005249 ...
3
votes
2answers
3k views

Change OpenLayers 3 view center

I'm using OpenLayers 3 to interact with some maps. I first declare my map: map = new ol.Map({ target: 'map', layers: [ new ol.layer.Tile({ ...
0
votes
1answer
61 views

Transform lat,lng into x,y

I have coordinate system with x and y. Also I need to show there x,y point but I have coordinates latitude, longitude. How I can trasform latitude, logitude into x,y to show on x,y scale?
1
vote
1answer
80 views

How do I know the cause of my spatial error?

A (probably?) very basic question about spatial error it's about time I knew how to think about and answer correctly. I have some data plotted from XY coordinates. I look at them and it turns out ...
1
vote
0answers
153 views

Kartograph - “projection not named”

The Kartograph package looks very promising, so I have been trying play around with it. As it turns out, I have been able to get the most basic map to work (the "world.json" example), but I could not ...
0
votes
0answers
35 views

Problem with Openlayers plugin adn Googlemaps [duplicate]

I have just installed QGIS 2.6.1 and I try to create a new project using googlemaps from Openlayers plugin but I am not able to zoom and move on the map. I have do not set anything so I was surprised ...