Questions tagged [georeferencing]

Aligning geographic data to a known coordinate system so it can be viewed, queried, and analyzed with other geographic data.

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28 views

Georeferencing DXF file using world file of raster in Python?

I have a DXF file of a floor plan. I know the location of the building and want to place it there using Cesium. The approach I have taken here is to georeference the DXF file using ArcGIS and them ...
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39 views

Determining CRS for contoured road map of England and Wales

I've been working with some old maps lately [1800-present] and I've had some difficulty identifying CRS/projection. This map has this written at the bottom. Based off of this, how can I find what ...
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23 views

Opening an ArcGIS .jgwx / jpg.aux georeferenced map with QGIS [closed]

I got an old map that I have to work with for my thesis and are running out of time. The map is georeferenced and I got it sent as two files - a jgwx file and a jpg.aux file. Is there a way to load ...
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30 views

Georeference Namibian LO system DWG files to use them in QGIS?

I am attached as an intern at Keetmanshoop Municipality, Namibia and I am developing a property tax cadastre. I have received the cadastral layout from the town planner but I cannot use the DWG files. ...
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31 views

Digitizing against PDF in ArcGIS Pro

I am relatively new to GIS and am using ArcGIS Pro. I am making a map of a property that includes a watercourse and an environmental setback from the watercourse. I need to add the development plans ...
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2answers
23 views

Georeferencing Large Image in Hilly Terrain

I've recently gotten my hands on some fairly high resolution (0.5m) imagery that needs to be georeferenced. I had been using the Georeferencer plugin in QGIS - using Google Imagery XYZ layer as the ...
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20 views

Georeferencing dwg file using GDAL/ogr2ogr

I have a .dwg-file which needs to be georeferenced via web application using GDAL or ogr2ogr without using ArcGIS or QGIS. I am really blind on achieving this. Any suggestions on how to do this?
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1answer
111 views

Goreferencing parcel map

I am attempting to georeference this parcel map from a local assessor's office. In doing so, I am using the georeferencer in QGIS 3.4. I am using the DMS coordinates on the image to reference the ...
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1answer
34 views

Georeferencing multiple “slightly” overlapping drone orthomosaics

Situation: I collected around 2000 drone images over 200 ha. My computer does not have the resources to render one large orthomosaic at once, so I decided to split my dataset into 8 and produce 8 ...
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2answers
29 views

Georeferencing/orthorectifying oblique aerial imagery over water

Does anyone have any advice on how one might georeference/orthorectify oblique imagery taken over the open ocean from a manned aircraft? The aircraft will have an RTK-enabled GNSS/INS onboard. I was ...
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1answer
33 views

Georeference raster in WGS84 and project in North azimuthal in QGIS

I have a raster (JEPG) image from a full planet surface (in this case Jupiter). I use QGIS and its plugin Georeferencer to add control points on the image. I use the four corners. Then I use Gdal to ...
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23 views

Can QGIS load a georeferenced (skewed) raster from PostGIS database?

Summary I can't load a georeferenced/skewed raster in QGIS if it is stored in a PostGIS database. Problem Details For some reasons, I need to create a skewed raster in a PostGIS database, and use it ...
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24 views

Georeferencer GDAL Plugin Not Present in Manage/Install Plugins

I have a student who has installed QGIS 3.x on her Mac OS and cannot locate the Georeferencer GDAL plugin. It does not appear in "installed" (as it should) nor via search in the plugins ...
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1answer
38 views

Geo-referenced raster in QGIS does not align with shapefile

I am using georeferencer in QGIS to align a rater with a boundary shapefile, but after georeferencing, the resulting raster shifts a bit but does not shift completely to the GCP as it is supported to ...
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24 views

How do I georeference automatically in QGIS 3.6

I use QGIS 3.6 on Windows. I use HiRISE images and I want to co-register them to other background images. I use the georeferencer plugin and I do it manually but still, there is a pixel misalignment ...
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32 views

Error with .jpeg in Georeferencer

QGIS error message when in Georeferencer: .jpg is not a supported raster data source. libjpeg: Bogus Huffman table definition How do I fix this? Tried different .jpeg and still doesn't work. Previous ...
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51 views

Is there a way to rasterize polygon with hatch pattern with GDAL CLI or in a Python script?

I am trying to automate some work previously done in QGIS. Target platform is AWS Lambda so there is no way to use QGIS or any other standalone GIS-specific application. QGIS provide a way to draw ...
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1answer
21 views

rasterio driver - weird bug that throws no error

I am using rasterio to convert some png files to geotiff files. My input is a geotiff and I do some processing to output a geotiff file using the following command: temp = cv2.imread(file) ...
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1answer
58 views

Georeferencing imported DWG layer using QGIS

I would like to georeference a DWG layer using QGIS 3. I have imported the DWG layer saved by Microsoft Office Visio Professional. After import I have a nice lookup like below. The problem is, that I ...
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1answer
23 views

Entering UTM Map Coordinates when georeferencing is not working

I'm trying to enter UTM map coordinates from a scanned image (grid), and I'm entering the coordinates correctly X/Y, but when I click to process the georeferencing - the image does not overlay where ...
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1answer
68 views

Converting GRIB2 to GeoTIFF

I am trying to convert a GRIB2 file to a GeoTIFF file using gdal. My Commands: gdal_translate -b 1 -a_srs EPSG:3857 some.grib2 some.grib2.tif gdalwarp -t_srs '+proj=longlat +datum=WGS84 +ellps=WGS84 +...
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1answer
27 views

Why is scale of image different in QGIS 3.10 than created?. CAD import and twf world file seems correct

I created an image by taking a picture of a tape measure(ruler). I rotated this image to north and made a world file .tfw for the tiff image. to get the pixel width for the twf file, I divided the ...
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47 views

How do we georeference a toposheet using GCS or PCS?

I am new to the GIS domain. I need to georeference a toposheet, Datum - WGS84, 1:50,000 scale map. I have done the georeferencing using WGS for GCP's and then projected to WGS_94_UTM Zone 43N, using ...
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48 views

Shapefile To svg to dxf and back to shapefile

I need to edit a complex vector polygon layer based on a raster layer. It will be a lot easier for me to do the drawings in an illustration software like Inkscape and then to import it back to QGIS. ...
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35 views

TIFF file issue [closed]

I started georeferencing an image. A TIFF file is saved in my desktop. But I couldn't view the image of the map ( while seeing the icon on desktop). I then add the raster layer in QGIS. But the map ...
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1answer
143 views

Differences between different georeferencing transformation algorithms in QGIS

Expanding on Transformation types in geo-referencing of QGIS?, I'm trying to understand the exact transformations used by QGIS, and how they differ. The georeferencer documentation is of course a good ...
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1answer
159 views

I cannot find the Georeferencer GDAL on QGIS 3,14 Pi [closed]

I only have 7 plugins installed and Georeferencer GDAL is not one of them any ideas?
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1answer
38 views

VIIRS products georeferencing

Can anyone tell how to reproject VIIRS products (interested VNP09 and VNP14IMG) into standard projection and reference system? I managed to process some of products like CLDMASK_L2 and even VNP14 (750 ...
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1answer
48 views

Georeferencing in ArcMap?

I am new to ArcMap. I have bistatic MiniRF data. This data is not georeferenced. I want to make this georeference. Correspondence to each pixel, I have one latitude and longitude information in ...
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11 views

Unwanted clipping occurs when georeferencing raster

I have a mercator projection map with the extent -180 to 180. I am attempting to georeference it to a shapefile with the same projection and extent. I align using known locations but when the newly ...
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1answer
20 views

Georeferencing bands at first then calculating NDWI, or, calculating NDWI at first and then georeferencing it

I want to get NDWI from MODIS mod021km as GeoTIFF files. As far as you know, MODIS images are not georeferenced and the point is georeferencing these imagages is a little bit inaccurate (because of ...
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41 views

Problems georeferencing an image in QGIS with subprocess.popen() and gdal_translate

I want to georeference a raster using GDAL in QGIS 3.10's Python console. When I use the plugin I get the following script (leave only two GCPs to make it easier to read): gdal_translate -of GTiff -...
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1answer
38 views

How is a GeoTIFF geographically referenced if it has no sidecar files?

I am currently downloading MODIS burned area fire products to use for a work project. One of these products is a GeoTIFF which indicates the day (Julian date) of the year when an area experienced fire....
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45 views

Create custom projections in QGIS 3.10?

QGIS does not have the coordinate reference system I need, So I decide to define a new custom Geographic coordinate system.To define a CRS, i have srs.db & .wkt file. I place these file as (a) ...
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1answer
44 views

Problems in changing projection using georeferencer in QGIS

I'm an amateur user and primarily use QGIS to change the projections of my fantasy maps, using the Georeferencer functon. Normally I enter non-equirectangular projections, plot the co-ordinates and ...
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1answer
56 views

Georeferencing HiRISE images in QGIS 3.6 on Windows

I have a CTX mosaic for a base layer in my project. However, I am running into trouble overlaying HiRISE images over it. HiRISE final products should be georeferenced, but they just do not fall into ...
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1answer
42 views

Extent of shapefile vs. extent of JPEG

I am having a problem. I follow the steps to try to georeferenced, but I see that the JPEG is much bigger than the shapefile when you add both to the table of contents. I try changing the extent on ...
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71 views

Adding a new CRS to QGIS 3.10 with custom coordinate reference system

I am using a Shapefile of which the projection is not recognized by QGIS. The .prj file of the shapefile has the following information: GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",...
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1answer
28 views

How to set the georeference of a layer

I can't find an answer and it's probably because I don't know the terminology, so if you could include terminology in the answer that would be swell. I have an image of some sort. I bring it into ...
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0answers
28 views

QGIS: How can I reproject multiple associated layers when improving the georeference of an ancient map?

If I add or move some georeferencing control points and re-georeference a map, then is there a way in which I can make the latest QGIS reproject the points/lines/polygons in associated layers ...
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22 views

is there a open source way to georeference a non geospatial vector (like eps, svg etc)?

Is it possible to reference a non geospatial vector file such as eps, pdf, svg, dxf etc.? The vectors I'm talking about are points and lines without any georeferences, but the size, the position and ...
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36 views

Georeferencing larger GeoTIFF's in QGIS

I have a GeoTiff (>100GB) and I want to georeference it in QGIS using the georeferencer option. I did manage to create the GCP's (>15) but when the georeferencing is set to run, it crashed mid-way. ...
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1answer
23 views

Fixing a raster with unknown spatial reference so other rasters show up

I am trying to create a dataset with data from different raster datasets in ArcMap. One of the raster datasets seems to have an "unknown spatial reference", and it shows "unknown" as XY coordinate ...
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68 views

How does gdal.ReprojectImage() work?

I'm using gdal.ReprojectImage() to reproject mod021km bands to geotif data. it takes one of the modis multiband subdatasets (e.g. EV_500_Aggr1km_RefSB with 5 bands) and saves it as a tif file with one ...
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14 views

Georeferencing Aviation Charts

I would like to georeference an Operational Navigation Chart so I can output the canvas as tiles for use in a mobile application. The map is this ONC G-3. My target SRS is WGS84-4326 (don't know if ...
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12 views

gdal2tiles for artistic map of specific size in kilometers

Imagine large hi-res image in ratio 2:1, which represents area of 10000:5000 km. The goal it to publish this map on web using e.g. openlayers with the pan/zoom support, yet enabling measurement (...
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18 views

Convert MODIS level-1 bands to GeoTIFF with Python [duplicate]

Is there any Python code to convert mod021km bands (red, green, blue, nir , ... bands) to GeoTIFF file? I tried pyModis but it takes a subdataset as a layer (e.g. "EV_500_Aggr1km_RefSB") and converts ...
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23 views

How to calculate corner(edge) coordinates for geo image

I want to add image layer to Azure map. To do that I need coordinates for the corners. With help of this site http://viglino.github.io/Map-georeferencer I am able to get center, rotation/angle and ...
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1answer
77 views

How to georeference a map using Python

Can somebody help me please to georeference a map with Python? Maybe I'm not setting right the row and column numbers? This is my code: import shutil from osgeo import gdal, osr orig_fn = 'G:/...
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28 views

Issue with image georeferencing of precipitation data generated by matlab.Map output is not matching with WRF output

I am trying to generate a map by using .nc output generated by a WRF model. WRF process gives out a map output for visualization. The .nc file is analysed in Matlab for gridded precipitation data ...

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