19
votes
Accepted
Auto-select suitable UTM Zone based on Grid Intersection
There's the utm package, a bidirectional UTM-WGS84 converter for python.
It's able to convert a (latitude, longitude) tuple into an UTM coordinate:
import utm
utm.from_latlon(51.2, 7.5)
>>> (...
- 14.5k
19
votes
Accepted
Why does the same UTM northing give different values when converted to latitude?
This is perfectly normal behaviour in a transverse Mercator projection. The fact that a specific northing does not match a specific latitude (except for the Equator itself) can be easily visualized.
...
- 3,866
18
votes
Accepted
EPSG code for UTM zone
The UTM zones and their respective EPSG codes cover the whole area of their respecive zone from the equator to 84N / 80S. These areas are subdivided by the letters from South to North, and these again ...
- 1,582
16
votes
Auto-select suitable UTM Zone based on Grid Intersection
Alright, the answer from Antonio above is definitely right and pointed me in the correct direction. Here is the complete code:
# convert_wgs_to_utm function, see https://stackoverflow.com/a/40140326/...
- 714
16
votes
Accepted
Layer disappears when changing from CRS in degrees to CRS in meters in QGIS
Do not use "Set CRS" within layer properties. This does not reproject your data. You only define the CRS there. Means: you tell QGIS that the layer is in a different CRS than it actually is.
...
- 35.6k
14
votes
Reprojecting vector layer in QGIS
To reproject a vector layer (or a batch of layers) (i.e. recalculate the coordinates values for a new reference system) you must go to Menu > Processing > Toolbox (this will open a side window). ...
- 141
14
votes
Accepted
What is this UK coordinate system?
Any data you receive from the UK with out a specified CRS will almost certainly be in OSGB (EPSG:27700) which is the preferred CRS of our national mapping agency (OS).
Your data appears to be no ...
- 83.2k
12
votes
Accepted
What does the U mean in UTM=(32, 'U')?
UTM 32U is one tile of the UTM 32N zone. This image from Wikipedia (here the link to the following image) should explain it clearly:
- 16.3k
12
votes
Accepted
Convert UTM zone into EPSG code
Use pyproj (version 2.2+):
from pyproj import CRS
# use PROJ string, assuming a default WGS84
crs = CRS.from_string('+proj=utm +zone=36 +south')
# or dictionary
crs = CRS.from_dict({'proj': 'utm', '...
- 42.4k
12
votes
Accepted
Determining CRS from given point coordinate set
Also you can try using projfinder. For instance, when one paste provided coordinates (4581211.88, 5811848.94)
You will see several options. Then you may assume the CRS, which is mostlikely the "...
- 34k
11
votes
Accepted
Different origins of UTM projection
Both coordinates are the same. As you are in the Southern Hemisphere a False Northing (of +10000000m) is usually applied to eliminate the negatives.
The utm package applies the false Northing by ...
- 11.6k
10
votes
Garmin FIT Coordinate System
For the latitudes and longitudes, you can divide the numbers by 11930465 (2^32 / 360) to get values in decimal degrees. The values seem to be stored in a signed 32-bit integer range, to represent the ...
- 3,866
9
votes
Accepted
QGIS field calculator giving area in acres in layer / project that is in UTM
Since QGIS version 2.14, the '$area', '$length' and '$perimeter' options are calculated based on the unit settings defined under 'Project > Project Properties' (see the changelog as well as the ...
- 1,986
8
votes
EPSG code for UTM zone
The latitude band is, strictly speaking, an MGRS thing, not a UTM thing. For UTM, all you need to know is which side of the equator you’re on, so for 29U, you can use EPSG:32629.
- 688
8
votes
Difference between UTM Zone 15N and UTM Zone 15T
Short answer: No, UTM Zone 15 N is not the same as UTM Zone 15 T.
Long answer:
UTM Zone 15 N means the area bounded by:
east-west boundaries are the longitudes 90° W to 96° W
north-south boundaries ...
- 25.1k
8
votes
Accepted
QGIS 3.6.1 problems with CRS
Following on Ian Turton's comment... Prior to performing ANY geometry calculations or analysis on a layer(s), the layer(s) MUST be 1) projected to the desired CRS, and 2) that CRS must be the same for ...
- 8,356
8
votes
Determining CRS from given point coordinate set
You can't determine the projection of a set of points just from the coordinates. Without some other information they are just random numbers. Go back to the data supplier and make them give you some ...
- 83.2k
8
votes
Determining CRS from given point coordinate set
It says right there in your column title "GK4" - which is for Gauss-Krüger Zone 4 (https://epsg.io/31468).
Another hint is the leading 4 on the X-coordinates.
An last but not least you ...
- 17.1k
8
votes
Converting table UTM coordinates to decimal lat-long in Attribute table using expression
You can this for "Long_DD":
x(transform(make_point("UTM_X","UTM_Y"),'EPSG:26916','EPSG:4326'))
and this for "Lat_DD":
y(transform(make_point("UTM_X",&...
- 35.6k
7
votes
Auto-select suitable UTM Zone based on Grid Intersection
pyproj can assist with this using the database query functionality. This is simpler to use and more robust as it queries the area of use of the CRS, which handles some strangeness in some parts of the ...
- 7,527
7
votes
Converting large data with lat and long into X and Y?
UPDATE:
After thinking about it, the most efficient method for you to transform the coordinates is probably to not use apply but to use the column array.
from pyproj import Proj
pp = Proj(proj='utm',...
- 7,527
7
votes
EPSG 3857 vs UTM coordinate
Both EPSG:3857 and UTM are based on Mercator projection. That is their likeness.
Differences have many:
Web Mercator (EPSG:3857) is Direct Mercator, it does not deform distances along the equator. ...
- 14.7k
7
votes
Accepted
Getting vertices of UTM grid in PostGIS
To extract the contextual corner points of each cell, find those vertices that have an angle greater than roughly 90° with respect to the preceding and following vertex:
SELECT
utm_c.[*], -- list ...
- 30.9k
7
votes
Explanation of syntax and parameters of a sample UTM projection file
This is a projected coordinate system with this name:
PROJCS["[email protected]",
which is based on a geographic (Earth-based) coordinate system with this name:
GEOGCS["...
- 66.5k
6
votes
Accepted
Transforming UTM layer to WGS using QGIS?
I'm using QGIS 2.18. Hope the steps below are helpful:
Make sure the shapefile with CRS "WGS84/UTM 17S EPSG:32717".
"Save as..". Save it into a new shapefile and change the CRS to WGS84.
Uncheck "add ...
- 707
6
votes
Where is UTM origin?
The answer depends on what you mean by "origin"
There are indeed 60 UTM zones numbered 1-60 and it starts at 180 W, so UTM zone 1 is used for longitude in [-180° -174°].
That being said, the origin ...
- 49.9k
6
votes
Accepted
How to make projected geometry and update it to postgresql?
As user30184 outlined:
It's a very common task, and there's plenty of documentation: ST_Transform.
To apply this, you need to figure out the EPSG codes of your projections.
UTM 35N probably is EPSG:...
- 1,777
6
votes
Setting correct UTM zone
No, you need 14N (N is for Northern Hemisphere). The "Q" is just a latitude band designation.
Latitude bands
Latitude bands are not a part of UTM, but rather a part of the military grid ...
- 69.6k
6
votes
Accepted
Convert decimal degrees to meters QGIS
First import the data in the CSV it's actually in. Once the data is imported, then you can reproject it into the desired CRS.
The coordinates in your CSV are in latitude and longitude. This means ...
- 25.1k
6
votes
Accepted
Difference of Assign projection, Reproject Layer, and Define layer projection in QGIS?
The difference is that reproject changes the geometry coordinates.
Let me start with a Point layer, with one feature, wich geometry is a point located in latitude = 1°, longitude = 2°.
The ...
- 14.7k
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