1. Computer Programs & Datasets

  2. PhD Thesis

  3. Mailing Lists (Geomorphometry)

     åðéóôñïöÞ óôçí êåíôñéêÞ óåëßäá 

The algorithms and mathematical models used depend mainly on the specific geomorphic-geologic context to which they are applied. This happens not only because in Greece, in Turkey, in Iran, in Great Basin (U.S.A.), etc., the morphotectonic and geomorphic context varies but because in each physiographic region a different kind of geologic information should be extracted, modeled and interpreted. Thus, the models used for Zagros Ranges are different than the models used in Great Basin and in future different approaches will be implemented in Greece and in Turkey.

Geomorphometric models are not a black box and a rather deep knowledge of the physical world is needed before we proceed to the interpretation of geomorphometric descriptions. In other words the map of Zagros Ranges (above) represent a view of the physical reality through a scientific theory that was transformed to a model and finally lead through abstraction to a conclusion. Either the scientific theory could be wrong or even the model could be insufficient..... BUT FOR THE TIME BEING my belief is that the generalization process and the models used in order to compose the above map (a) express the relationship of theory to data and (b) lead to a valid conclusion

  • geomorphometry mailing list : A list that points out information resources for the geomorphometry and the processing of digital elevation models, related conferences, data availability, algorithms and methods, scientific news, etc. The aim is to promote geomorphometry to new scientists and to integrate advances in geomorphometry and news that are distributed in various fields (remote sensing, geography, geology, surveying, etc.). --> Visit the Geomorphometry list , send a message: geomorphometry@yahoogroups.com (subscribe, first).
Computer Programs & Datasets:

a) Expert System Shell , b) Geo-Fuzzy Shell , c) GeoLogic Shell

You might download the source code of Geologic Shell from the web site of I A M G , the International Association for Mathematical Geology from the web link to the paper Miliaresis, G.Ch., 2001. Extraction of Bajadas from Digital Elevation Models and Satellite Imagery.   Computers & Geosciences,  27,(10), 1159-1169. [ doi:10.1016/S0098-3004(01)00032-2  ] or FTP: v27-10-05.zip. Important notice, in the v27-10-5.zip file not only the source code but the executable file, a portion of the DEM of the study area and some processed DEM images (aspect ,gradient bajadas surface etc.) were included in favourite of the C&G readers. More specifically:

  • The delphi source code files are the following: GEOLOGY.DPR ,GEOLOGY.RES , GEOLOGY.DOF, DEM.DFM, DEM.PAS , IO.PAS , ALGORITH.PAS , PLAYA.ICO, HISTOGR.DFM , HISTOGR.PAS , LIST.DFM , LIST.PAS .
  • The data files are the DEM.DOC (header) and DEM.IMG (image) in idirisi file format.
  • The rest of the files are the outcome of certain processes with Geologic.exe

The executable file and more sample data (DEMs & TM images) are available through the hyperlinks below :

  1. DATA: the DEMs that were in spherical coordinates (latitude, longitude) were converted to a rectangular grid and registered to the satellite sensor imagery
    1. Great Basin winzipped, filesize 0.128 Mb - contain: GTOPO30 DEM. The study area is bounded by latitude 38ï 15' to 42ï North and longitude 118ï 30' to 115ï 30' West, the spacing is 925m and the size 319 columns and 301 rows.
    2. Alluvial_Fans - winzipped, filesize 0.254 Mb - contain: USGS 1-degree DEM, DRG file (1:250.000 topographic map) & TM bands. Åast Central Death Valley: latitude 36ï 06' to 36ï 14' North and longitude 116ï 49' to 116ï 40' West, spacing 75m, size 171 cols and 201 rows.
  2. Data origin: GTOPO30, GLOBE and the 1-degree DEMs files are distributed through the InterNet, while the TM Image, the 15-minute DEM, the DRG files of Nevada and the paper topographic maps were bought from USGS. The files (DEMs, scanned maps, TM images) given here include only the small portions used as study areas during my research. More details about data:
    1. Documentation
    2. Maps
      • Topographic Map of the Death Valley-California, scale 1:250,000, U.S. Geological Survey.
      • Digital Raster Graphix (DRG) files of Nevada (a CD with scanned 1:100,000 topographic maps) Open-file report 96-5. Nevada Bureau of Mines and Geology, OR you might download the digital maps from the address DRG 30x60' Quad index of Nevada.
    3. Imagery
      • Landsat-Thematic Mapper Image of Death Valley-California, (path 040, row 035) acquired on the 23rd of June 1984, Order: USGS 0119612270019.
    4. DEMs

T H E S I S

  1. 1987- Dept. of Geology, Univ. of Athens: Mathematical Study of Downcutting Erosion and it's Correlation to Geodynamics, 95 p.
  2. 1990- Dept. of Geomatics Engineering, U.C.L.: Ridges & Valleys Extraction from DEMs, 75 p.
  3. 2000- Dept of Surveying & Regional Planning, National Technical University of Athens: Recognition of Landforms from DEMs & Satellite Imagery with Expert Systems, Pattern Recognition and Image Processing Techniques, 267 p., (Abstract in English). Download PhD Thesis & presentation (in Greek) following the hyperlinks below:
  • Introduction (PHD_0.PDF), (0.33 Mb, 10 p.)
  • Chapter 1 (PHD_1.PDF) (1.36 Mb, 51 p.): Terrain Classification System and Photo-interpretation Keys for Intermontane Basins
  • Chapter 2 (PHD_2.PDF ) (2.01 Mb, 79 p.): Representation of the Photo-Interpretation Knowledge for the Basin Ranges Physiographic Province in the Hybrid Expert System Shell NÅxpert Object
  • Chapter 3 (PHD_3.PDF) (1.96 Mb, 65 p.): Extraction and Recognition of Mountain Features From Moderate Resolution Digital Elevation Data
  • Chapter 4 (PHD_4.PDF) (0.85 Mb, 61 p.): A Fuzzy Pattern Recognition KnowledgeBase for the classification of mountain objects
  • Conclusions (PHD_5.PDF) (0.08 Mb, 2 p.)
  • Power point presentation (Thesis.ppt ) (1.7Mb, 41 slides)