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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8
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1answer
280 views

Using customized Coordinate System for Archaeological site data

I don't know so much about coordinate systems... In my office we use to deal with spatial data coming from archaeological sites. Each site has its own x-y-z coordinate system (GCS). Three simple ...
1
vote
1answer
335 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
1answer
108 views

Slight translation with coordinate-transformation from Gauss-Kruger to WGS 84. Possible Reasons?

I have a number of points in Gauss-Kruger, Zone 3 that I want to convert to display them within Google-Earth. Assuming WGS84 for Google-Earth the transformed coordinated differ from the original ones ...
1
vote
2answers
49 views

Equations to convert from global cartesian coordinates to geographic coordinates

First, I needed to convert geographic coordinates (like those received from GPS) to global cartesian coordinates. I found an earlier question (How do I calculate a xyz-position of a gps-position ...
0
votes
1answer
321 views

Geoprocessing tool not executing when Map's SpatialReference is Web Mercartor

I am facing a strange issue when trying to execute GP service when my map's spatial-reference is Web Mercator. I appreciate all help. I have a JavaScript API application. Initially I only had my map ...
4
votes
2answers
178 views

Best formula for calculating short distances in UTM?

I'm fairly new at calculating distances with precision, but I wanted to know what is the best formula for calculating short distances in UTM coordinates. The distances that I'am calculating are all ...
0
votes
1answer
193 views

Myanmar Datum 2000 information

Does anybody know where I can find the technical details for Burma's latest datum? It's called Myanmar Datum 2000 and I can't find any details online. I need the details to create a custom datum on my ...
0
votes
1answer
74 views

What kind of unit of measurement for scale does SQL Server 2012 Spatial use?

What kind of unit of measurement for scale does SQL Server 2012 Spatial use?
2
votes
3answers
174 views

Geodesic measurements for short distances throughout US?

My ArcGIS experience has been limited to working on large-scale maps with planar projections. I'm moving to a project in which I want to calculate the distance between pro sports facilities throughout ...
2
votes
1answer
53 views

How set correct options for displaying a grid in QGIS composer?

I am using q. 2.5 4291337 in Windows 7 64 bits. I am working with raster and vector layers in EPSG 26714 (UTM NAD27 14N). In this version of QGIS, you are able to put a grid in a different CRS of the ...
0
votes
2answers
26 views

Different output for Fiona Shapefile CRS

Loving fiona, but have a small coordinate system issue. I'm trying to read the crs property on a shapefile to validate projection. Below I contrast fiona documentation with what is output on my ...
2
votes
1answer
50 views

Which EPSG for UTM with 8 digits in QGIS

I have a UTM datasets with 8 digits, so the first digits are 32 (for UTM Zone 32N), but which EPSG should I use to get the data at the right spot in QGIS in a 6 digits system. If I want to transfer ...
0
votes
1answer
99 views

Coordinate mix up

I am working on a basic map, pulling coordinates from google earth, converting them to decimal degrees in excel, and then importing them into qgis. I am using qgis 1.8. When converting from degrees, ...
1
vote
0answers
26 views

Fix shapefile with basemap in ArcGIS for Desktop? [duplicate]

How I can fix the shapefile with the basemap in ArcGIS 10.2? I have transform the basemap projection to GREECE GRID, the same with the shapefile...but they don't fix exactly... I try to attach a ...
1
vote
0answers
21 views

ArcPad GPS Data Captured misaligned

Data captured using ArcPad 10 is not displaying properly. The .shp file created in arcpad is diplaying a NAD 83 Zone 17 projection. From what I've been reading, the datum for GPS is usually in WGS ...
0
votes
1answer
37 views

Programmatically Select a CRS in QGIS 2.4 using Python

When you run the following Python code in the Python Console of QGIS 2.4, uri = "file:///C:/data.csv?type=csv&xField=lng&yField=lat&spatialIndex=no&subsetIndex=no&watchFile=no" ...
1
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0answers
73 views

How to import a map consisting of pictures

I want to built some sort of Fantasy Map with Quantum GIS. The whole map is built out of 128x128 single pictures, 16384 in total. It should be a flat map. How do I import these pictures and align ...
1
vote
2answers
207 views

Add custom CRS - 2.2.0 Valmiera

i've builded a custom proj.4 library, tested it by command line (proj and cs2cs) and with postgres/postgis. All works fine. Now i'm trying to make the same with Qgis 2.2.0. I've replaced the original ...
0
votes
2answers
74 views

Converting coordinates to 4326 for Google Maps.

I have a MultiLinestring, example coordinates, (698745.50201423 4210011.04002000) and I would like to convert them to something like (24.362 42.458) to use in Google Maps. When I try to get the SRID ...
3
votes
1answer
63 views

Transforming coordinates from one projection to another

var bounds = config.init_center.transform( new OpenLayers.Projection("EPSG:31466"), new OpenLayers.Projection("EPSG:3857")); console.log(config.init_center); console.log(bounds); I have ...
5
votes
2answers
12k views

How much is 1 meter in decimal degrees?

I supposed to know this but unfortunately I do not know. I am using Tester to select objects that are bigger than 1 meter. My data are in EPSG:4326. How much is 1 meter in decimal degrees?
9
votes
0answers
154 views

How do ESRI and QGIS calculate scale values of geographic projections? [closed]

Does anyone know how (from which location) scale values are calculated in ESRI products and QGIS for geographic projections? The only thing I've noticed is that QGIS is changing scales when you pan ...
0
votes
0answers
32 views

georeference a grid by using a script

I've got an image and a set of coordinates, which represent a grid, that looks similar to this: What I'm looking for is a script, that would transform my image, by using such a grid. Edit: My ...
2
votes
0answers
66 views

How to calculate grid convergence (True North to Grid North)?

I would like to know how to calculate the grid convergence angle between True North and Grid North for UTM maps. I am using ArcGIS 10.0 (ArcView licence) and have used the Calculate Grid ...
1
vote
1answer
30 views

Converting a California Coordinate System Zone 6 value

On this page: State Plane Coordinate System - Convert, View on Google Earth I have entered: 0406 California Zone 6 X (meters) 1895486.55 Y (meters) 329169.63 Then "Calc" produces: Degrees Minutes ...
1
vote
1answer
37 views

Find lat/lng weighted midpoint from a list of points

Hello I would like some help on a specific task, I am a truck driver and I have an historical list of cities, lat/lng, count where count is the number of times that I've made a delivery in that ...
2
votes
0answers
34 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 ...
3
votes
1answer
60 views

Need advice for localized survey base point

I have a set of 4 control points used for H and V localization. There is a base point located far to the SW of the property. I did not create this myself, but took it off of an existing Pocket 3-D ...
3
votes
2answers
40 views

Generic Grid to Coordinate System

I have been given a large dataset of X,Y positions of animal movements in a generic grid system. It uses 0,0 as an origin and then position units are in feet from origin. I have the geo-referenced ...
3
votes
1answer
851 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 ...
2
votes
1answer
232 views

Coordinate systems conversion

I have the following task. This is my sample data. WGS84 datum (longitude/latitude): -123.75 36.59788913307022 -118.125 40.97989806962013 Spherical Mercator (meters): -13775786.985667605 ...
3
votes
1answer
32 views

Clearing data frame projection of current mxd using ArcPy?

I am required to open a bunch (50 per week) of mxd's and 'Clear' the Coordinate system from the data-frame to make sure my students have all of their data projected in the same (correct) Coordinate ...
4
votes
1answer
517 views

In ArcObjects, how do I change the spatial reference of a Map (Data Frame) in an existing MXD?

I need to change the spatial reference of an existing MXD programmatically. In ArcMap UI, I would take the following steps: 1) Open the data frame properties and go to the Coordinate System tab; 2) ...
2
votes
1answer
45 views

How to use qgis coordinate transformation in user code

I am now working with coordinate transformations between different CRSs, e.g. latlong to UTM. After comparisons, I found out that the coordinate capture plugin in QGIS is quite accurate for the ...
1
vote
2answers
27 views

What kind of coordinate uses this WMS? Also how to convert to lat/lon

On this map http://infomapa.rosario.gov.ar/emapa/mapa.htm which I believe is MapServer, I get some coordinates after inspecting with Chrome like this: "geoJson" : ...
3
votes
0answers
60 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 ...
0
votes
0answers
28 views

Storing 3D Oracle sdo_geometry objects with a 2D SRID

I'm trying to understand the implications of storing 3-dimensional sdo_geometry values in Oracle when the geometry's SRID is a 2-dimensional system. The database I'm studying uses SRID 4326 (WGS84 ...
1
vote
1answer
378 views

proj.4 definition for Moscow GCS_Bessel_1841 to WGS84 convertion

I'm developing an app which should show a map using Leaflet framework but i have no luck as the coordinate system on the map server differs from the one used by Leaflet. As a map server i use ...
2
votes
1answer
40 views

How to build custom CRS to export QGIS to Google Fusion Table

I want to export my layer from QGIS as a CSV to import it into google fusion tables. The problem is the qgis export for the geography column is in the wrong format for what google wants. QGIS ...
2
votes
3answers
60 views

matching coordinate systems by transforming and projecting

matching coordinate systems of all my data (transforming, projecting) My data uses the GCS_Bessel_1841 coordinate system. Would there be any inaccuracies if i would transform it to DHDN 3-Degree ...
3
votes
3answers
82 views

Find CRS (coordinate reference system) based on known location and coordinates?

Is there any tool or any tutorial which would help me to figure out CRS (coordinate reference system) from related information? In my particular case I know only the system is in meters, has origin ...
1
vote
0answers
23 views

Appropriate reference system for small-scale mapping of the Middle East

I want to create a thematic map of the Middle East that displays certain historic places and regions on a small-scale map (between 1:6.000.0000 and 1:12.000.000). The map has to center the boundary ...
2
votes
1answer
65 views

problem transforming CRS coordinates EPSG:4269 to EPSG:3857 in python

source_srs = get_srs(shp_abs_path) source_epsg = source_srs.GetAttrValue("PROJCS|GEOGCS|AUTHORITY", 1) print source_epsg #prints 4269 target_epsg = 3857 # because these are headed to leafletjs ...
0
votes
1answer
72 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 ...
2
votes
2answers
38 views

Overlaying misaligned DGN file in ArcGIS for Desktop?

I received a DGN file, I believe created in Bentley 8, and there is a bit of a misalignment problem. The dgn, when overlain on a Bing Maps aerial or NAIP image, shows up about 20 m or so off. I'm set ...
2
votes
0answers
30 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 ...
1
vote
0answers
16 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 ...
0
votes
0answers
16 views

Is there a way to include code/language for offsets within the “script” at the CRS dialogue screen

I'm pretty new to QGIS and coming from being just good enough to be dangerous in Manifold GIS. I have some JPEG 2000 rasters that were exported from Manifold in UTM 18S, and then imported into QGIS, ...
0
votes
1answer
101 views

Regional Large Scale Map Projection Choice

I am currently designing a geospatial product that will be primarily used for large and intermediate scales that cover an entire state of the US or more. The UTM projection would be ideal because of ...
3
votes
2answers
42 views

Digital Elevation Model and Shapefile not aligned in openWind

I have a digital elevation model and a shapefile containing point features for the location of wind turbines. These two layers appear to be aligned in QGIS but when I open them in openWind, they are ...