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.

Filter by
Sorted by
Tagged with
0 votes
0 answers
11 views

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+...
Colin 's user avatar
0 votes
0 answers
34 views

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?
amina k's user avatar
0 votes
0 answers
25 views

Best map projection for buffers and Euclidian distance in Cox's Bazar, Bangladesh (20sq.km)

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, ...
Obleo Demandre's user avatar
-1 votes
0 answers
33 views

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 ...
Whogius's user avatar
0 votes
1 answer
29 views

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 ...
Vladimir Z.'s user avatar
0 votes
0 answers
27 views

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 ...
Jacqueline Hernandez's user avatar
0 votes
0 answers
17 views

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 ...
Pierrick Rambaud's user avatar
0 votes
0 answers
29 views

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 ...
Him's user avatar
  • 121
0 votes
1 answer
16 views

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 ...
MKF's user avatar
  • 561
0 votes
0 answers
26 views

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 ...
JC_CL's user avatar
  • 141
0 votes
1 answer
34 views

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 ...
Daniel AG's user avatar
1 vote
0 answers
46 views

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 ...
TigerTen's user avatar
2 votes
1 answer
79 views

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 ...
Herman Toothrot's user avatar
0 votes
0 answers
23 views

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 ...
robkew's user avatar
  • 1
0 votes
0 answers
22 views

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 ...
Char's user avatar
  • 1
1 vote
1 answer
78 views

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 = ...
paul's user avatar
  • 11
0 votes
0 answers
59 views

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 ...
Ari's user avatar
  • 33
0 votes
0 answers
18 views

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 ...
wodank's user avatar
  • 1
0 votes
0 answers
30 views

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 ...
Jonny Quest's user avatar
1 vote
2 answers
52 views

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 ...
Algae's user avatar
  • 11
0 votes
0 answers
55 views

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 ...
nieswand's user avatar
1 vote
1 answer
60 views

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 ...
KirstC25's user avatar
1 vote
2 answers
47 views

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 ...
Nikos's user avatar
  • 936
0 votes
0 answers
20 views

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 ...
user224027's user avatar
1 vote
1 answer
30 views

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 ...
Gilles's user avatar
  • 383
1 vote
0 answers
34 views

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 ...
road board's user avatar
0 votes
1 answer
24 views

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....
D.Cape's user avatar
  • 3
1 vote
1 answer
33 views

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 ...
Daniel Harper's user avatar
0 votes
2 answers
49 views

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 ...
Luiz Borges's user avatar
3 votes
2 answers
284 views

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 ...
Gilles's user avatar
  • 383
0 votes
0 answers
7 views

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 ....
sabrina muscolino's user avatar
0 votes
1 answer
47 views

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)...
Benny Jobigan's user avatar
0 votes
1 answer
44 views

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,...
Simon Forster's user avatar
0 votes
1 answer
36 views

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 ...
Magic Mushroom's user avatar
0 votes
0 answers
9 views

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 ...
Mattia Koren's user avatar
1 vote
0 answers
29 views

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)? ...
user232920's user avatar
1 vote
0 answers
48 views

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 ...
Jas Singh's user avatar
2 votes
1 answer
82 views

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: ...
David's user avatar
  • 23
0 votes
0 answers
24 views

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 ...
jadzi's user avatar
  • 1
0 votes
0 answers
28 views

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 ...
Wmsu OSicat's user avatar
1 vote
1 answer
53 views

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=...
Dennis Bauszus's user avatar
0 votes
0 answers
26 views

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(): ...
taylor-series's user avatar
0 votes
1 answer
43 views

How to get a raster dataset to display in correct location

I'm working in ArcGIS Pro (v 3.1.3) and I have a raster .jpg dataset that has an unknown spatial reference system. After building pyramids and statistics, the raster will draw in Arc, however is not ...
BiancaK's user avatar
0 votes
0 answers
49 views

Getting NO2 concentrations for a given area

I am trying to get the NO2 concentrations at different coordinates for a specified area. From the nc file downloaded from sci hub copernicus, I extracted the latitude, longitude and the NO2 ...
user232750's user avatar
1 vote
1 answer
48 views

Defining a custom central meridian and latitude of orgin for Winkel I projection in QGIS [closed]

I'm trying to redefine the Winkel I projection using the Custom Projection option in QGIS to define the central meridian as -100 (100 degrees west) and the latitude of origin as 40 degrees north. I'm ...
Jenn's user avatar
  • 19
1 vote
1 answer
85 views

Projecting an old Ordnance Survey map in Cassini-Soldner Grid

I have an Ordnance Survey map of North West England (1921, quarter inch to the mile) that doesn't conform to British National Grid/EPSG:27700. I suspect that the projection might be Cassini-Soldner ...
flyhigher's user avatar
  • 133
0 votes
1 answer
67 views

How do I tie survey data to a coordinate system?

I have Record of Survey drawings from Marin County that I can plot in CAD, but I am not sure the best/easiest way to place the lot lines into a coordinate space. I found some benchmarks in the County ...
Zachary Russell Heineman's user avatar
3 votes
1 answer
100 views

Creating buffer for MultiPolygon that covers all its surroundings in QGIS

When I try to use the Buffer tool in QGIS, it only allows me to create buffers in degrees ("grados" in the screenshot below) and it does not give me the option of changing the units (to ...
Felicia's user avatar
  • 31
3 votes
2 answers
84 views

TAB file can't be saved in EPSG:3414 using QGIS

In QGIS 3.22.8 I am trying to convert the file from SHP to TAB. Shapefile has clearly defined CRS: EPSG:3414 - SVY21 / Singapore TM. When I save it as TAB (CRS defined as well): I am getting a TAB ...
Maria Savchenko's user avatar
2 votes
1 answer
96 views

Sorting coordinates as per polygon in QGIS

I have a list of our sales lead locations in Excel with their coordinates. What I wish to do is that I need to sort those coordinates as per the condition if they lie within a certain polygon or not. ...
VVstack43's user avatar

1
2 3 4 5
165