conversion of digital elevation maps to geological information
1
Faculty of geosciences Conversion of digital elevation maps to geological information Aart-Peter van den Berg van Saparoea Utrecht University, Department of Earth Sciences, Budapestlaan 4, 3584 CD Utrecht, The Netherlands phone: +31 (0)30 253 5119, fax: +31 (0)30 253 5030, e-mail: [email protected] Time Sea-level river shelf erosion surfaces river shelf basin Space Time erosion surfaces raw data (sequential DEM’s) erosion and deposition patterns geological maps geological sections analysis software scan (photogrammetry or laser) flume We are developing software to perform this task. The core of the system consists of a set of algorithms which calculate deposition and erosion of sediments from series of raw x, y and z coordinate sets. The results of these calculations can then be used to construct geologi- cally meaningful objects, such as formations and erosion surfaces. On top of this is a layer of software that automates information storage, retrieval and visualisation. This dramati- cally cuts the effort required to produce geologically meaningful results. Finally, the system has an easy to use graphic user interface. The system uses only ASCII format text files con- taining x, y and z coordinates as input, allowing maximum flexibility and compatibility. Information produced by the system includes basic erosion/deposition maps, geological maps, geological sections, plots of the amount of time contained in hiatuses and Wheeler diagrams. Modular design allows easy addition of functionality to the basic framework as needed. DEM A DEM is the equivalent of a stratigraphic surface of a single age. There- fore a data set of successive DEMs not only contains a large amount of ‘geological’ information on the final stratigraphy of the system, but on the entire development of the system in three dimensions through time as well. The challenge is to retrieve and visualise this information. Wheeler diagrams Data obtained from flume experiments consists primarily of successive digital elevation models (DEMs). Comparison of this type of information with geological field data is difficult. We have developed software to solve this problem.
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Transcript of conversion of digital elevation maps to geological information
Faculty of geosciences
Conversion of digital elevation maps to geological information Aart-Peter van den Berg van SaparoeaUtrecht University, Department of Earth Sciences, Budapestlaan 4, 3584 CD Utrecht, The Netherlands phone: +31 (0)30 253 5119, fax: +31 (0)30 253 5030, e-mail: [email protected]
Time
Sea-
leve
l
river shelferosion surfaces
river shelf basin
Space
Tim
e
erosion surfaces
raw data (sequential DEM’s)
erosion and deposition patterns
geological maps
geological sections
analysis software
scan (photogrammetry or laser)flume
We are developing software to perform this task. The core of the system consists of a set of algorithms which calculate deposition and erosion of sediments from series of raw x, y and z coordinate sets. The results of these calculations can then be used to construct geologi-cally meaningful objects, such as formations and erosion surfaces. On top of this is a layer of software that automates information storage, retrieval and visualisation. This dramati-cally cuts the effort required to produce geologically meaningful results. Finally, the system has an easy to use graphic user interface. The system uses only ASCII format text files con-taining x, y and z coordinates as input, allowing maximum flexibility and compatibility.
Information produced by the system includes basic erosion/deposition maps, geological maps, geological sections, plots of the amount of time contained in hiatuses and Wheeler diagrams. Modular design allows easy addition of functionality to the basic framework as needed.
DEM
A DEM is the equivalent of a stratigraphic surface of a single age. There-fore a data set of successive DEMs not only contains a large amount of ‘geological’ information on the final stratigraphy of the system, but on the entire development of the system in three dimensions through time as well. The challenge is to retrieve and visualise this information.
Wheeler diagrams
Data obtained from flume experiments consists primarily of successive digital elevation models (DEMs). Comparison of this type of information with geological field data is difficult. We have developed software to solve this problem.
