print the pixel coordinates of a specific point in the raster
Question:
To print the pixel coordinates of a specific point in the raster, i used the index() method assuming that The index() method takes the x and y coordinates of the point in geographic coordinates and returns the corresponding row and column indices of the point in the raster.
I want to double-check that.
Is this the best way to handle it?
I’m a beginner, and I’m still unsure about when and how to use the affine transformation.Is it necessary to perform the affine transformation before printing the pixel coordinate?
import rasterio
with rasterio.open("LC08_L2SP_190037_20190619_20200827_02_T1_ST_B10.TIF") as data:
print(data.crs)
longitude, latitude = 13.3886, 52.5174
row, col = data.index(longitude, latitude)
print("Pixel coordinates of point ({}, {}): ({}, {})".format(longitude, latitude, col, row))
Answers:
This code uses the rasterio package to read in a GeoTIFF file and extract information about its coordinate reference system (CRS) and the pixel coordinates of a specified latitude and longitude point.
The code first opens the GeoTIFF file using the rasterio.open() function and stores the resulting DatasetReader object in the variable data. It then prints out the CRS of the raster using the crs attribute of the DatasetReader object.
Next, the code specifies a longitude and latitude point (longitude, latitude = 13.3886, 52.5174) and uses the index() method of the DatasetReader object to convert the point’s coordinates to the corresponding row and column indices in the raster. The resulting pixel coordinates are then printed out using string formatting.
Note that the index() method assumes that the input coordinates are in the same CRS as the raster. If the input coordinates are in a different CRS, you may need to transform them using the rasterio.transform module’s transform() or reproject() functions before calling index().
To print the pixel coordinates of a specific point in the raster, i used the index() method assuming that The index() method takes the x and y coordinates of the point in geographic coordinates and returns the corresponding row and column indices of the point in the raster.
I want to double-check that.
Is this the best way to handle it?
I’m a beginner, and I’m still unsure about when and how to use the affine transformation.Is it necessary to perform the affine transformation before printing the pixel coordinate?
import rasterio
with rasterio.open("LC08_L2SP_190037_20190619_20200827_02_T1_ST_B10.TIF") as data:
print(data.crs)
longitude, latitude = 13.3886, 52.5174
row, col = data.index(longitude, latitude)
print("Pixel coordinates of point ({}, {}): ({}, {})".format(longitude, latitude, col, row))
This code uses the rasterio package to read in a GeoTIFF file and extract information about its coordinate reference system (CRS) and the pixel coordinates of a specified latitude and longitude point.
The code first opens the GeoTIFF file using the rasterio.open() function and stores the resulting DatasetReader object in the variable data. It then prints out the CRS of the raster using the crs attribute of the DatasetReader object.
Next, the code specifies a longitude and latitude point (longitude, latitude = 13.3886, 52.5174) and uses the index() method of the DatasetReader object to convert the point’s coordinates to the corresponding row and column indices in the raster. The resulting pixel coordinates are then printed out using string formatting.
Note that the index() method assumes that the input coordinates are in the same CRS as the raster. If the input coordinates are in a different CRS, you may need to transform them using the rasterio.transform module’s transform() or reproject() functions before calling index().