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Results tagged with coordinate-system
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user 155987
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. This tag also refers to cartographic projections and coordinate system transformations.
8
votes
2
answers
3k
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Define custom CRS in WKT from point and angle
I'm trying to define a custom CRS using the WKT Syntax. However when I do the projection I'm off by about 2km.
Here is my rotation point.
Local X and Y:
X: 4635.396 Y: 2397.085
MGA94 Zone50:
x: 560 …
- 551
2
votes
1
answer
552
views
Define custom projection in QGIS from some control points
I have six control points in a local mine grid which I want to use to define a custom projection in QGIS. The reference points are in GDA94 / MGA zone 50 (EPSG:28350) (https://spatialreference.org/ref …
- 551
5
votes
Define custom CRS in WKT from point and angle
Update - See python script below for an answer
Original String (Red)
+proj=omerc +lat_0=-23.2583926082939 +lonc=117.589084840039 +alpha=-0 +gamma=0 +k=0.999585495 +x_0=0 +y_0=0 +ellps=GRS80 +units=m …
- 551
2
votes
1
answer
520
views
QGIS Custom Projection in WKT not saving .prj file
I've created a Custom Projection System in QGIS using the WKT format (see code below). The custom projection using a local grid system and transforms it GDA94 / MGA zone 51.
It works well in QGIS to l …
- 551
6
votes
2
answers
741
views
Getting text name of current project CRS in QGIS Layout
I'm want to display the current project projection in a QGIS layout.
Right now I can get QGIS to display the current EPSG number like below:
But what I want to do is get QGIS layout to print the E …
- 551
1
vote
Using PROJ.4 library to transform from local coordinate system coordinates to global coordin...
I was stuck in the same problem a few weeks ago, I figured out a python script that can help. Original solution from here
import pyproj
import math
import numpy as np
from statistics import mean
impo …
- 551