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https://github.com/mprakhar/DSM2DTM

Code for the paper - Comparison of Digital Building Height Models Extracted from AW3D, TanDEM-X, ASTER, and SRTM Digital Surface Models over Yangon City
https://github.com/mprakhar/DSM2DTM

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Code for the paper - Comparison of Digital Building Height Models Extracted from AW3D, TanDEM-X, ASTER, and SRTM Digital Surface Models over Yangon City

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Code for the paper - Comparison of Digital Building Height Models Extracted from AW3D, TanDEM-X, ASTER, and SRTM Digital Surface Models over Yangon City. If you find this useful, please cite as -  Misra, P.; Avtar, R.; Takeuchi, W. Comparison of Digital Building Height Models Extracted from AW3D, TanDEM-X, ASTER, and SRTM Digital Surface Models over Yangon City. Remote Sens. 2018, 10, 2008.

https://www.mdpi.com/2072-4292/10/12/2008



# DSM2DTM



Notes: 



A) This is a Python based implementation of "ADVANCED DTM GENERATION FROM VERY HIGH RESOLUTION SATELLITE STEREO IMAGES" by Perko et al (2015).

https://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/II-3-W4/165/2015/isprsannals-II-3-W4-165-2015.pdf

This code is a modification of Perko et al (2015) to suit coarse resolution DSM e.g. ASTER, AW3D30.



B) This runs on Python 2.7. Also download get_DSM.py and classDSM.py in the same folder. Make that folder as the active folder.



C) To run, type in terminal:



python get_nDSM.py  --inputDSMpath 'path/for_trial.tif'  --outputnDSMpath 'outfilesample.tif'  --img_resolution 30  --neighborhood_kernel 300  --height_threshold 3  --slope_threshold 60



D) Help options:



python get_nDSM.py -h



E) Varibale decription



 img_resolution is the resolution in meters. e.g. SRTM it should be 90. Regarding other optional arguments:

 

  1)

  

  --inputDSMpath INPUTDSMPATH

                        full path to DSM file which needs to be converted.

                        e.g. \home\AW3D.tif

                        

  2)               

  

  --outputnDSMpath OUTPUTNDSMPATH

                        full path to output nDSM file after converted e.g.

                        \home\AW3Dout.tif

                        

  3)      

  

  --img_resolution IMG_RESOLUTION

                        image resolution in meter

                        

   4)           

   

  --neighborhood_kernel NEIGHBORHOOD_KERNEL

                        how far (in meter) should the kernel size be considered.

                        Recommended - Lower distance for higher resolution.

                        

   5)                     

   

  --height_threshold HEIGHT_THRESHOLD

                        minimum height difference (in meter) between ground

                        and building. Generally height of 1 storey building.

                        

   6)                     

   

  --slope_threshold SLOPE_THRESHOLD

                        minimum slope between a building and ground pixel (in

                        degrees)

                        

                        



F) Please also ensure that following modules are present:

Rasterio               #(Install by: pip install rasterio)

Cv2

Scipy

Numpy

Math

Matplotlib



## --------      Request for feedback     -----------------------------



I shall be grateful if you intend to use this code in a project. Kindly let me know your intended applications with this code. I will be happy to assist with problems/issues and feedback :  ozprakharpooner at gmail dot com