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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38 views

QGIS 'Save As' Reprojection Produces Different Results from ogr2ogr command line

Another 3857 vs 4326 question. When I reproject from EPSG:3857 to EPSG:4326 (and from .shp to .geojson) via the QGIS 'Save As' dialog, I get results that display in the expected place on Google Maps. ...
0
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0answers
17 views

In PostGIS, is it possible to use `ST_SnapToGrid` align to a coordinate system?

I am wondering if it is possible to align a raster or geometry by specifying the coordinate system using the spatial reference identifier, i.e. 4326 for WGS 84. I did not see anything in the ...
2
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2answers
80 views

Projecting shapefile with unknown CRS to WGS84 using QGIS?

I've tried setting QGIS to on the fly, changing the layer settings, nothing. I'm at a lost cause. Although I am not a GIS professional. ...
2
votes
1answer
498 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 ...
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0answers
39 views

Is it possible to find Lat,Long coordinates of points within a polygon whose GPS coordinates is known [duplicate]

I have a set of gps coordinates which make up a polygon. Is it possible to find Latitude,Longitude coordinates of points within this polygon using GPS coordinates of the polygon I already possess. ...
2
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0answers
25 views

Calculating area with Europe Albers Equal Area in QGIS [closed]

I am trying to calculate the area for a number of polygons in EPSG:102013, having changed it from EPSG:3857. When using the field calculator $area, the entire column was returned as nan. Has the ...
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0answers
24 views

same projections but different extents

I have two shapefiles that contain the same projection (WGS_1984_UTM_Zone_51N) but their extents are far from each other. One shapefile has this parameters: Left:2.000000 m Right:7791.000000 m ...
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1answer
29 views

error: 'Cannot read property 'divideBy' of undefined', L.Proj with esri.leaflet

I am trying my first attempt at adding an (in-house published) ArcGIS basemap to a Leaflet based web application, using Proj4Leaflet and esri-leaflet. Here is my js: var crs = new L.Proj.CRS('EPSG: ...
1
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1answer
26 views

Adding multiple datasets to ArcMap with the same coordinate reference system but different transformations

I want to be able to load multiple datasets to my mxd, using various CRS (coordinate reference systems). Some of these datasets will use the same CRS, but with different transformations. When I load ...
1
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0answers
64 views

How do I get the lat-long coordinate of point 1 from a survey plan [closed]

Here are the data from the survey plan: TIE LINES from BLLM No. 3, PLS 561, to corner "1" of: LOT ----------Bearing--------------------Distance Boundary ----S 36deg 41min W ------11,641.21 meters ...
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0answers
51 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 ...
0
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1answer
48 views

What would a map of the world look like if lat/longs were treated as projected coordinates? [duplicate]

I'm not quite sure if I'm phrasing this right. It's just occurred to me that lat/longs are two dimensional coordinates like any other projected coordinate system, so it's presumably possible to create ...
11
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3answers
4k views

Official term for latitude longitude coordinate system?

May I know what is the correct specific term for latitude longitude coordinate system? With "Geographic Coordinate", it seems to be a general term for every other system?
2
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1answer
136 views

British National Grids projection does not add Ordnance Survey grids to shapefile?

I have created a shapefile in ArcCatalog by right-clicking the folder I want it in, then selecting new, then shapefile, then changing the type to "polygon", and using the British National Grids under ...
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0answers
29 views

Proper projection name for NAD83 2011 revision

I have two PRJ files, one from ESRI and another from some custom GDAL/OGR code I wrote (pasted below). I was trying to have both work in NAD83 UTM10N with the 2011 revision. The ESRI file has 2011 in ...
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0answers
37 views

Creating a kml file in Google earth in UTM format to get attributes in UTM format

i want to create kml file in google earth and use it in UTM coordinate system for preprocessing in HEC Georas.When i imported the kml file in GIS, it still showed the attribute in WGS format as in the ...
1
vote
1answer
71 views

How to detect coordinate reference system (CRS)? – I cannot display two vector layers in QGIS at the same time!

When I in QGIS try to display layer (a) together with another layer (b) that differ in their CRS it doesn’t work. Both are vector shapefiles. I have tried both with using QGIS ‘on the fly’ CRS ...
2
votes
3answers
68 views

Strange coordinate system [closed]

Here's an extract of a feature from the web that I converted to geojson using qgis. However, the coordinates are not standard are at all and when trying to actually preview it on the web it fails, ...
5
votes
4answers
14k views

Convert latitude and longitude into northings and eastings

Hi I have the following UK postcode dy8 3xt and know that the latitude and longitude is:- 54.452772 -2.156082 I also know that the Eastings, Northings for the postcode is:- 389490 283880 ...
0
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1answer
50 views

Is there a way to transform a node OSM point into the reference GPS system of a car?

I have a car with a GPS (WGS84) and a camera (who shot the road) fixed on it. I would like to know is there is a way to get the transformation from a OSM node to the GPS cartesian coordinate fixed on ...
2
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0answers
105 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 ...
1
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1answer
67 views

how can I put those x y location in ArcMap?

Does anyone can help me some tips to put those x,y in the excel spreadsheet to Arcmap? It doesnt show on the map when I try. I think the problem is the projection. I tried coordinate system: ...
0
votes
2answers
58 views

CRS problem between QGIS and fiona / OGR

I have a really annoying problem working with QGIS for visualization and python (fiona / OGR) for the actual operations. I am, by example, doing a simple dissolving operation with fiona. The input is ...
0
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1answer
27 views

Where are coordinate system files saved when using the ArcGIS Citrix app?

Is there a standard location where coordinate systems are saved within ArcGIS when using a Citrix app? Or maybe a redirected folder location?
2
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0answers
79 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 ...
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1answer
45 views

arcgis 10.2 .shp with no projection info but .xml file

I need help opening a shp file which has no projection info in ArcGIS 10.2 I have .shp , .shx , dbf and .xml file. The .xml file details are below . QUESTION : can i make .proj from below ...
0
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0answers
50 views

bounding box - generate coordinates

I will be using mongodb database which supports data on an Euclidean plane (not spherical). I will be performing queries which return all points within a box. For the box I need to specify the upper ...
2
votes
1answer
91 views

Transforming from WGS84 UTM30N to British National Grid (BNG)?

I am using ArcGIS 10 and trying to work in British National Grid. My shapefile is in WGS84 UTM30N. I passed the shapefile across to a colleague and we both transformed into BNG. When we compared ...
1
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2answers
93 views

Using Geotools: How to convert these strange coordinates from a shapefile into regular lat and long?

I use this dataset from the European Union: http://www.eea.europa.eu/data-and-maps/data/administrative-land-accounting-units Opening the shapefile with Java' Geotools, I see coordinates like: ...
3
votes
1answer
72 views

Is it possible to define a custom CRS for a shapefile in QGIS that uses hundredths of a US foot?

I have several polygon shapefiles whose coordinates are defined as 100x their original coordinates projected from the Washington State South HARN State Plane in us-ft (EPSG 2927). I would imagine the ...
1
vote
1answer
38 views

Good projections for Middle East and North Africa in D3?

I'm a data visualizer who's mostly worked with US data, and I'm familiar with AlbersUSA project. However, I'm going to be doing a series of graphics on the Middle East. Any suggestions or interesting ...
3
votes
2answers
165 views

Is WGS84 a Coordinate system or projection system? [duplicate]

WGS84 is often referred to as a "projection system" and sometimes it is confusing to me about what a "projection system" is and where WGS84 falls in one. Could someone please clear that up for me?
33
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11answers
14k views

Identifying Coordinate System of Shapefile when Unknown?

I have a Shapefile but its coordinate system is Unknown, and there is no *.prj file. How I can identify it now? Are there any tools that could help?
1
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2answers
66 views

How to Convert Property Survey Monument Marker Coordinates to State Plane?

I have a set of Connecticut monument locations (a monumented property survey using monuments designated CGS Mon. No. 1577-1580). Their coordinates appear to me to be in meters (244536.84 N, 386409.67 ...
3
votes
1answer
85 views

What system do these coordinates use? (from LinkedGeoData.org)

I have extracted these coordinates from geolinkedata And I don't know what system they are using: (-15.4400797 28.131791000000003) What I know is that they correspond with these WGS84 Coordinates: ...
1
vote
1answer
64 views

Locating British National Grid Eastings/Northings in ArcGIS Pro i.e. ArcMap Go To XY equivalent?

In ArcGIS Pro is there a way to search for Eastings and Northings for Britain, similar to the Go to XY in ArcMap?
3
votes
2answers
81 views

EPSG:3575 projected bounds

I've been trying to find out what the projected bounds are for EPSG:3575 but have not been able to find a definitive answer. Normally, I'd just use the values from EPSG.io but when I tried these in ...
0
votes
1answer
47 views

Equidistant Cartesian projection for NYC

I'm working on a project in which I cluster locations in New York City based on their distance. My dataset contains latitude and longitude and thus I'd like to project it to a 2D Cartesian space in ...
22
votes
5answers
30k views

Get list of coordinates for points in a layer?

I've got a layer in QGIS that is comprised of points. Its attribute table doesn't have (show) the corresponding x and y coordinates for each point. Is there a way for me to extract a list of ...
2
votes
1answer
135 views

How to project a GeoJSON on the fly in OpenLayers 3?

I have been trying to load a GeoJSON without success. I have a map with a background layer from OSM. I have some data in 4326 I want to overlay on that map. I do not want to transform coordinates one ...
2
votes
1answer
86 views

How to modify or create a wider UTM zone?

am working on a project to do country-wide mapping using projected coordinate system such UTM. However, the country (Zambia) is covered by three UTM zones, namely zone 34,35 and 36.I have read ...
2
votes
2answers
676 views

Misaligning shapefiles in QGIS, OpenLayers and ArcGIS Desktop?

I'm working with a set of shapefiles and have some problems with the "align" of them in QGIS when I load Openlayers to reference some points. OLs has an straight horizontal baseline but the shapefiles ...
1
vote
1answer
44 views

OpenStreetMap (OSM) data is misregistered upon download, in just one area?

I have a satellite image over the area of Forez, France. I checked that the landmarks on the corner points coincide with the landmarks of Google Maps at the same coordinates, so the image is not ...
2
votes
1answer
28 views

How to interpret BUFR descriptors

I'm processing BUFR products from Eumetsat and I would like to ask for your help about the following descriptors: 002028 SEGMENT SIZE AT NADIR IN X DIRECTION 002029 SEGMENT SIZE AT NADIR IN Y ...
1
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2answers
62 views

Using lists to work with feature classes having different spatial references in ArcPy?

This is my first arcpy script attempting to use lists. Input: 4 dif Excel files, each with a dif spatial reference Output: 4 dif feature classes (in same geodatabase), each with original spatial ...
1
vote
1answer
35 views

Transform from Lambert Azimuthal “old” to ETRS89_LAEA

I'm currently struggling to convert a small .asc dataset with no defined projection. The projection that has to be first applied is Lambert Azimuthal "old" projection: In PROJ.4 +proj=laea +lat_0=48 ...
0
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0answers
43 views

How to project WRF data (lat/lon) onto ArcGIS maps

I have climate data generated using the WRF model, in lat/lon format (lambert conformal projection), in an Excel file. I'm looking to project / overlay this data onto a map of the UK using ArcGIS, ...
1
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1answer
226 views

Difference between Geographic and Projected coordinate systems?

What is the difference between a geographic coordinate system and a projected coordinate system?
13
votes
1answer
10k views

Which is correct projection in ArcGIS Server for EPSG:3857/900913?

I want to publish a mapservice in ArcGIS server, which will be overlayed on Google Maps or Bing Maps. For this, the Map Service needs to be in EPSG:3857/900913. The Google Maps projection is supposed ...
3
votes
1answer
75 views

Local Ortho projection to Proj4

We are trying to use proj4 to project a local coordinate system to EPSG4326. We believe we have most of the string created correctly in QGIS and as follows; +proj=ortho +datum=WGS84 ...