Linked Questions

0
votes
1answer
177 views

Devising arbitrary coordinate system for site-plan that cannot be georeferenced? [duplicate]

In ArcGIS 10.1 (advanced lisence) I have imported the plan of a site. The plan has no coordinates, and I couldn't georeference the plan since it has undergone changes during the last 30 years. So, the ...
1
vote
0answers
50 views

projection and coordinate system for non georeferenced archaeological site [duplicate]

I'm an archaeology student working on a recent project and I'm wondering how to set my arcGIS project. I'm used to work with geographical data in ArcGIS on a large scale, but the current project is ...
0
votes
0answers
31 views

Create a custom CRS based on a known PSM [duplicate]

We have some CAD data that's based off a Permanent Survey Mark (PSM) (details below). How do I create a CRS so that the data can be brought into GDA94 (4283)? PSM: 110326 GDA94 Lat: 12D 39M 50.5201"S ...
0
votes
0answers
20 views

Custom metric projection definition in QGIS with reference point and azimuth [duplicate]

I need to create a custom CRS. I have a reference point in UTM NAD83 18N, an azimuth (30) and the extent. The projection must be metric, I know I have to use PROJ4 but the language is not very ...
6
votes
2answers
4k views

GDAL rotate DEM

Is it possible using any of the command line GDL tools such as gdalwarp, etc to perform a rotation of DEM data - a GeoTiff for example? Anyone know how to do this? UPDATE1 After clearing out ...
3
votes
2answers
5k views

Conversion between lat/lon and local coordinate system

I have local coordinate system, this is the red grid on the image. Red grid XY points measured in meters, and I know: The 0;0 point of the red grid and the lat/lon coordinates of this one point. (the ...
5
votes
2answers
847 views

How do I construct (or select) an appropriate local Cartesian coordinate system, for an arbitrary small area?

I'm relatively inexperienced with coordinate reference systems, so please bear with me if I'm not putting this clearly. I have existing software which works with an abstract (un-referenced) 3D ...
2
votes
2answers
821 views

Defining coordinate reference system with rotation in GeoServer?

I am using GeoServer and have a layer in EPSG:900913 ("Google Mercator"). I need to "rotate" the map around certain point (say, 1500000, 7000000) by certain degree (say, 30 degrees clockwise). How ...
2
votes
3answers
1k views

proj4: how to convert UTM to local coordinate system

I'm trying to convert a set of UTM32N coordinates to a local coordinate system with the same datum. I have the four Helmert parameters (x,y,scale,theta) that defines the coordinate system. How can I ...
5
votes
3answers
333 views

Converting from oblique and non-cartesian custom coordinates system with PostGIS?

I have a custom coordinates system that is: Not cartesian: The X-axis unit is 25m & Y-axis 6.25m Oblique: None of both axis' azimuth is North-South (0°). X-axis goes 54.2° & Y-axis 324°. ...
3
votes
1answer
1k 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 +lat_0=40....
3
votes
2answers
508 views

Creating local accurate projection for proj4?

We recently discovered that the UTM projection we have been using is not accurate enough for our application when doing calculations that require distances. Instead of rewriting our code base to use ...
1
vote
2answers
2k views

Latitude Longtitude to X, Y, Z coordinate system using python

does anyone know how to go about converting lat, long, alt to x, y, z where you have an origin for x/y coordinate (specific place in London)? In other words, I have a lat long and alt data and would ...
4
votes
1answer
1k views

Relocating & resizing complex shapefile with OpenSource Software

(please excuse my poor english) I do have a polygone shapefile of an archaelogical site with elevation data of 10cm steps and I dont get hands on the raster data as it was collected by the drone. My ...
6
votes
1answer
865 views

Buffer miles in decimal degrees with fiona and shapely

I have a script where I parse geojson earthquake data from around the world and create the point locations of the earthquake incidents. The script works fine. The CRS is 4326 or wgs84/lat long. I am ...

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