Questions tagged [coordinate-system]
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.
8,255
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QGIS Reproject Tool doesn't change vector size?
I'm new to GIS, so would appreciate any advice and explanations. I'm confused about the Reproject tool in QGIS.
So, I created a square vector grid in QGIS, with 100 4km by 4km cells. The grid was ...
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Marking coordinates on map layer, but code is not running [closed]
var text = require('users/gena/packages:text');
function maskS2clouds(image) {
var qa = image.select('QA60');
// Bits 10 and 11 are clouds and cirrus, respectively.
var cloudBitMask = 1 <&...
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CAD to Geodatabase - Identifying DNG Spatial Reference
I received several DNG files that I need to convert into GIS-geodatabase format.
I do not have the spatial reference of the DNG file and I don't have a way to request that from the creator.
When I run ...
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Point Files not always aligning based on Coordinate System
I have two CSV files that have GCP points for a drone survey area. The points are exactly the same location just collected in different coordinate systems. First is NAD83 (CSRS) / UTM 10N and the ...
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gdal projection string not recognized by arcpy.SpatialReference()
I have a raster image that has a custom projection system. I used the following code to retrieve the projection information from the raster and turn it into an ArcGIS recognized PCS following this ...
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Exporting 3D contours to DXF in QGIS
I used to work with QGIS, now I don't remember the stages I have done. So,I wanted to ask you about it.
My problem is, when I export 3d contours (that was made from SRTM DEM by doing a [raster>...
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What is a tenth of a second (WGS 84) in feet? [duplicate]
What is the equivalent of a tenth of a second (WGS 84) in feet? This would be located in northern NM in the US.
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Best projection for New England/Northeast? [closed]
I'm stumped on what projection to use for data that spans New England and northern New York. My first thought was to use UTM, but this region spans two UTM zones (18 and 19). I'm interested in ...
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Projection Issues between Pix4D and QGIS [closed]
I am conducting mapping missions with a DJI M300 RTK drone and P1 with an Emlid RS2+ base station and processing through Pix4Dmapper (4.8.4). GCPs were taken within the survey area using the Emlid RS2+...
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Georeferencing in ArcGIS [closed]
I just started georeferencing an image as usual but I got suprised with the input DEM longitude and latitude been disappeared.
Can you tell me why?
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Best map projection for buffers and Euclidian distance in Cox's Bazar, Bangladesh (20sq.km) [closed]
My study region is a 20 square kilometre area in Cox's Bazar, Bangladesh, and I am using R. I'm wondering which map projection would be the most accurate for measuring linear distances between points, ...
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How do Tissot's indicatrix look in a gnomonic projection?
For a mathematical problem (no homework)
A map is given with Tissot's indicatrices.
How can I conclude if the map is gnomonic or not?
(Just to be complete , a gnomonic projection is a projection were ...
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CRS for georeferencing TCP flight maps of Spain
I want to georeference TCP flight map of Spain.
It says: Lambert Conformal Conic Projection
Standard Parallels 41dg 20' and 46dg 40'
Convergence factor 0.69491
QGIS does not offer this CRS and even ...
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How to put TIFF orthomosaic in GCS projection show up over LAS dataset and rasters
I'm working in ArcMap. I have an orthomosaic (TIFF) that was originally projected in WGS 1984 and EGM2008 vertical datum. I need it to match up with a LAS dataset and the associated rasters, which are ...
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How to unclip an image using rasterio?
I have a data transfer pipeline that is expecting an image in EPSG:4326 covering the whole world. The image I downloaded from my service provider is clipped to north America. Is there a way to ...
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Picking a projection over which to aggregate point data
I have some polygons, say, TIGER counties, or hexagons, or what have you. I also have point data that I would like to aggregate over those polygons.
I will be displaying this data on a web map, so ...
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How does rioxarray reproject match handle nan values?
I have a couple GeoTiffs where the "no data" value is set to 32767. I want to set those values to NaN and then use nearest neighbor interpolation to resample the data and match the ...
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Importing a set of X-Y coordinates - data gets split and partly misplaced at the boundary of Austria GK Central and Austria GK East
I have an Excel file of coordinates of a line structure (think river or infrastructure like road, railways etc) without any info about the coordinate system except that it says GK in the X and Y ...
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Assign a CRS to a raster in R
I have a raster that does not contain any crs. After I assign a crs, the raster still appears in another location. Am I missing something?
library(raster)
#> Loading required package: sp
#> The ...
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Identifying the coordinate system in a set of Australian data
I have the following set of data.
Name
Easting
Northing
Point 1
7675
0576
Point 2
7758
0330
Point 3
7568
0864
I would like to know what coordinate system this data uses, to convert it to latitude ...
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Is there a comprehensive list of mapnprojections implemented in R?
I would like to experiment a bit with different and less-frequently used projections in R for global maps, but I am playing a guessing game as of which are actually working.
I tried to look up ESRI or ...
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Pyproj Azimuthal Equidistant (AEQD) transformation always gives a small rotation as compared to country-specific CRS transformations
I am calculating building polygons from a satellite image.
This works accurately when using a country-specific CRS.
I would like to use a customer CRS, specific to the location at hand, but find that ...
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Assigning coordinate value to raster with GDAL Python
This might be easy, but my search has not been successful yet...
I have a multiband raster file that contains projection and geotransform metadata. When I write my file into an array, I would like to ...
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Transforming from NAD83(2011) or from WGS84 gives the same result (pyproj)
I'm trying to transform (using pyproj) the same coordinates, first from WGS84, and then from NAD83(2011), and I'm getting the same result:
from pyproj import CRS, Transformer
from_wgs84_transformer = ...
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59
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How to find long/lat (in Python) from a GeoTIFF that does not have CRS
I have a GeoTIFF file that in Python the dimension is (9991,10439). I need to know the long/lat information for each pixel but the problem is the CRS is None for this file and when I try to create a ...
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Custom created Polygons don't display on Folium map
I've got a Geopandas Dataframe (polygon_df) that looks like the one below, these Polygons were created by a Yolo segmentation algorithm and transformed twice from their original format (this ...
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Some iterative way to compute heading and GPS projection at the same time?
I have the following situation:
An off-road machine has a GPS antenna that is not at the center of the rear axle (this point is my path-tracking-control point). Let's say it's 3 meters from the rear ...
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How to set simple square grid as coordinate system in QGIS
I have a set of coordinates of drill sites that have x and y values ranging between 1-300. My task is to interpolate a 3D model out of them but that's easy. What I'm struggling with is setting a ...
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Order of coordinates when transforming with GDAL in Python
I'm trying to use GDAL in Python to transform coordinates from one CRS to another.
More specifically, from MGI / Austria GK M31 (EPSG:31258) to WGS 84 (EPSG:3857). For example, I want to transform the ...
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Calculating volume of fill needed using QGIS
I have a project where I have to estimate fill volumes required to fill in small valleys. I have point data with elevations from GPS measurements from which I've created DEMS for each valley. I've ...
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Export image to it's nominal scale
I am trying to export an image without having to specify the scale and the CRS in the Export.image.toDrive function. In order to do this I found online a solution which I tried to apply it on my ...
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Planetary (Venus) coordinate reference systems
I'm trying to understanding the projections and trying to load in Venus global map data but when I try to align different maps with the same projection, or even change projection, I consistently get ...
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EPSG for ETRS89 / Lambert Conic in Spain?
Official projections in Spain are based on ETRS89 / UTM.
A royal decree says Lambert Conic Conform should be used for small scales. I found a paper that describes well the parameters of that ...
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Adding WMS-Maps to the Layer-section in QGIS by making groups and subgroups through Python
I want to add WMS-Maps to the Layer-section in QGIS, where there should be a group and sub-groups with those. The wish is to add the WMS-Maps to the Layer-section and group them at once-time by using ...
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Differences in extracted values after projecting raster
I am trying to project a raster to EPSG:3035 to match the CRS of the grid file on which it should be extracted to.
I use this code:
NDVI_2005 <- raster("data_Raster/Greenness/mosaic2005_2006....
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36
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Overlaying map shaper geometries
I seem to be getting an issue when trying to create TopoJSON from two shapefiles and then overlaying them with D3. One is a linestring object, a pipe, and then other is the map.
If I upload a zip file ...
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How to rotating a DXF world map along the longitude using QGIS?
I don't know much of GIS in general, but I tried to find an answer for that for a long time.
I have a vector world map in SVG (CRS Equal Earth) that I converted to DXF in Inkscape. I want to rotate it ...
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Orientation differs between projections. What is the "Real" North? [closed]
Below are two screenshots of the same data, featuring plots of land considered for a photovoltaic array. Depending on the projection used, there is a difference in the orientation of features.
(Taken ...
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No valid training data were found. (Error code: 3) with Random Forest
In the last two days I integrated three new variables: NDVI, EVI and Copernicus Land Cover. Since that moment my model doesn't go. I tried to cover the entire AOI with Modis and Copernicus Image with ....
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Incorrect transformation being used in GeoPandas?
Using GeoPandas, I am loading a csv with log data from a DJI drone, which contains longitude and latitude in WGS84 (4326). For my project, I am working in EPSG:6559 (esri calls it "NAD 1983 (2011)...
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Importing DWG issue
When I import a DWG, into QGIS, sent by an architect it is not located in the correct place. I'm using EPSG:27700
If I edit the file in CAD and move the drawing by a factor of 1000, so 415287786.3,...
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Define latitude longitude grid from center point
I would like to create a regular squared grid from a particular point. I have a polygon, I take the center of this polygon and I would like to create a grid that contains this polygon using Python.
I ...
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Copernicus C3S Dataset: details on CRS and Projection
I am working with Copernicus C3S data and I am having difficulty interpreting the descriptions relating to the Projection entry on the portal. I understand that Regular lat/lon means WGS84, my problem ...
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How to make TIFF output file with coordinate reference system (CRS)
I am working on TIFF files to produce the median matrix for them, I am using the following Matlab code for that.
How I can make the output as .tif while keeping the coordinate reference system (CRS)?
...
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Assign CRS for drone imagery
I am importing TIFF imagery from the Phantom 4 Multispectral drone which does not have predefined CRS. When I double click the layer and go into the source tab and select a CRS, it displays over the ...
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Issue with GPKG imported in QGIS
I am starting to use QGIS and have been struggling to get a GPKG package to sit properly.
This package contains the London conservation are information, which can be downloaded from the link below:
...
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Layers with the same coordinate system do not overlap [duplicate]
I have the shp from my city and I created a layer with points in my city through an Excel sheet with X and Y coordinates. Both layers are in WGS_1984_UTM_Zone_21S but do not overlap. The only ...
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28
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Decimal degrees in Main Project Map but not in Print Layout Grid
My main map is in decimal degrees (ex. 122.0610 and 6.9119), but when I try to have a Print Layout, the Grid units are different (ex. 396000.00 and 764600.00). I want to maintain the same grid units ...
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autonavi / amap xyz tile layer appears shifted in OpenLayers (Chinese Web Mercator with GCJ-02 datum)
I am trying to add an xyz source tile layer to OpenLayers v8.1.
The source URI for the tiles is the Chinese autonavi / amap provider.
http://webrd0{1-4}.is.autonavi.com/appmaptile?lang=zh_cn&size=...
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QGIS Clip raster bands SCP QGSPointXY(): overload error
What is the cause of this error and how do I remove it? I was trying to execute clip raster bands using coordinates.
An error has occurred while executing Python code:
TypeError: QgsPointXY(): ...
