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gdalwarp -geoloc allows you to use the complete 2d-array of latlon as georeference. With that, you can use any target CRS to reproject your data to a commonly used projection. See my answer to this question for an example: How to match a raster NetCDF data with a vector layer in QGIS?


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Your table is already georeferenced! Go to "Map view" to see the geometries. :-) (Check that your "the_geom" column contains rows of type Polygon and that the cartodb_georef_status column is set to true. If you want to run another georeferenciation process in your table, because for example not all your rows were correctly geocoded, make sure you delete the ...


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Just try to check the Spatial Reference of your image. If there is no spatial reference set for your image, try to define its spatial reference.


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You have commented "when i georef the shapefile" which makes me think your procedure is astray. Perhaps you are defining a Projected Coordinate System on a shapefile in a Geographic Coordinate System (which has lat/long values) i.e. using Define Projection when you need the Project tool. You should be georeferencing the CAD file not the shapefile. There ...


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Reading this "Georeferencing from GeoTIFF is supported in the form of one tiepoint and pixel size, a transformation matrix, or a list of GCPs." I think is not possibile to write lon/lat for each image pixel like a layer...


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The information present in the text file is not sufficient to georeference the images. After Googling some of the column headings and arriving at this page, it appears what you're given are easting/northing coordinates for (apparently) the image centers. Eastings and northings are coordinates as measured from a specific origin point in either a standard ...


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If you have a regular grid of points aligned with your X and Y axis, and you rotate it, then the distance between your points parallel to the X (or Y) axis will change. This is the same with pixels, because they are resampled as rectangles with their sides parallel to the axis. As for the georeferencing, it can include a change in scale, so obviously the ...


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In my case I have this: Driver: GTiff/GeoTIFF Files: CLM_201410281015.tiff CLM_201410281015.tiff.aux.xml Size is 3712, 3712 Coordinate System is `' Image Structure Metadata: INTERLEAVE=BAND Corner Coordinates: Upper Left ( 0.0, 0.0) Lower Left ( 0.0, 3712.0) Upper Right ( 3712.0, 0.0) ...


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Make sure to order simple grib data, grib with headers can not be read with GDAL. gdalinfo reports the following on a sample file: Driver: GRIB/GRIdded Binary (.grb) Files: msg3.grb Size is 3712, 3712 Coordinate System is: PROJCS["unnamed", GEOGCS["Coordinate System imported from GRIB file", DATUM["unknown", SPHEROID["Spheroid ...


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You can download this dataset from Natural Earth Data and open the SHP as a layer in QGIS, for example.


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If you want to write a lasfile with SRS information, you must create your liblas::Writer using a liblas::Header that has a defined SRS. Change your code to this: ofstream ofs; liblas::Header header; liblas::SpatialReference srs; srs.SetFromUserInput("EPSG:4326"); header.SetSRS(srs); header.SetPointRecordsCount(1); ofs.open("test.las", ios::out | ...


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Inacurracy is a way of life for the GIS professional. Depending on the source of your roads they could be many metres from their correct location; normally data comes with metadata which should contain a date and an approximate accuracy figure. For example 250k data will be mostly within 125 metres of its' correct location, conversely GPS tracklogs will ...


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Provided the Aerial Image is accurate to your project needs and you have re-projected the Line Shapefile to match the spatial reference of the Image, you can use the Spatial Adjustment Toolbar to get started with some semi-automated fixes to your line data.


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If you know that you can refine the GCP later, write the georeferencing result to a vrt file using the GDAL batch conmmandline export. You can edit that later with any text editor, and add additional GCP's. Re-georeferencing a tif is more complicated, because the first round you georeference ageianst pixel coordinates, while the second run uses the ...


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What sort of transformation options are available to you depends on whether the LiDAR data in question was collected by a terrestrial (fixed position) scanner or some sort of mobile or airborne platform. If it was collected terrestrially, the answer also depends on whether the data you are speaking of was collected from one scan or multiple scans. Below I ...


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Here is an alternative which you can do using QGIS: Load a shapefile which covers your area of interest Set the project CRS to WGS84 Create a vector grid with the same spacing as your toposheet uses Densify the vector grid Change the project CRS to the UTM zone for the area of interest Start the georeferencer and load the scanned map Georeference the ...



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