# Topographic Correction

Copyrights (c) 2008 by Olaf Conrad
References:
Civco, D. L. (1989): 'Topographic Normalization of Landsat Thematic Mapper Digital Imagery', Photogrammetric Engineering and Remote Sensing, 55(9), pp.1303-1309.
Law, K.H., Nichol, J. (2004): 'Topographic Correction for Differential Illumination Effects on Ikonos Satellite Imagery', ISPRS 2004 International Society for Photogrammetry and Remote Sensing, pdf.
Phua, M.-H., Saito, H. (2003): 'Estimation of biomass of a mountainous tropical forest using Landsat TM data', Canadian Journal of Remote Sensing, 29(4), pp.429-440.
Riano, D., Chuvieco, E. Salas, J., Aguado, I. (2003): 'Assessment of Different Topographic Corrections in Landsat-TM Data for Mapping Vegetation Types', IEEE Transactions on Geoscience and Remote Sensing, 41(5), pp.1056-1061, pdf.
Teillet, P.M., Guindon, B., Goodenough, D.G. (1982): 'On the slope-aspect correction of multispectral scanner data', Canadian Journal of Remote Sensing, 8(2), pp.1537-1540.

## Parameters

Grid system
Grid system
  Grid system
Elevation
Input Grid
Original Image
Input Grid
Corrected Image
Output Grid
Solar Position
Node
Azimuth [Degree]
Floating point
  Maximum: 360.0
Declination [Degree]
Floating point
  Maximum: 90.0
Method
Choice
  Available choices: Cosine Correction (Teillet et al. 1982), Cosine Correction (Civco 1989), Minnaert Correction, Minnaert Correction with Slope (Riano et al. 2003), Minnaert Correction with Slope (Law & Nichol 2004), C Correction
Minnaert Correction
Floating point
  Maximum: 1.0
Maximum Cells (C Correction Analysis)
Integer
  Maximum number of grid cells used for trend analysis as required by C correction.
  Minimum: 10.0