I have a dataset of 20 Landsat scenes (MSS, TM, ETM+) for 20 years (one scene per year). Scenes are in WGS 84, EPSG 32634 coordinate system and I can easily project = geometrically correct them to S_JTSK, EPSG 5514, using Project raster Tool (Data Management in ArcGIS 10.1).
As my area of interest is in mountaineous region, I would like to orthorectify scenes using DEM (from Shuttle Radar Topography Mission, res ~ 30m) but I don´t know really how to do this. I can´t find my rational polynomial coefficients (RPCs) needed for automatic ortorectification in my data and really I can´t imagine how to do this orthorectification. Any help please?
Best Answer
Answer for others so confused people as I am:
To know how to deal with downloaded raw Landsat data - what else in pre-processing do I need?
Firstly check their processing level in_MTL.txt file (included in downloaded Landsat image: http://landsat.usgs.gov/Landsat_Processing_Details.php)
Processing level = DATA_TYPE
If possible, Landsat scenes are processed to Standard Terrain Correction (L1T) (Level 1T -precision and terrain correction with DEM). If there are no ground-control or elevation data for L1T , the best level of correction is applied (Level 1G-systematic or Level 1Gt-systematic terrain).
Source: http://landsat.usgs.gov/Landsat_Processing_Details.php
Final geodetic accuracy of the product depends on the accuracy of the ground control points and the resolution of the DEM used.
If I am not wrong, my Landsat data are finally in L1T so I don´t have to orthorectify them - they have to be already ortorectified.