Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
Book Description
The Defense Mapping Agency is a producer of raster formatted elevation data in a form called DTED (Digital Terrain Elevation Data). This data is collected from digitized source maps and from optically or digitally correlated stereopairs of photographic imagery. The various means used in producing DTED sometimes introduce a striation anomaly into the data. Conventional techniques for handling this anomaly have included the use of convolution with smoothing filters. Smoothing, however, degrades the high quality resolution of the data. A more precise method specific only to the anomaly was required. To accomplish this, an interactive Fourier frequency filtering program was designed to allow analysis and filtering of the DTED in the frequency domain. The process allows the analyst to use the data's amplitude spectrum as an aid in designing an area specific low-pass, band-reject, or fan- reject filter. This technique can result in almost total elimination of the striation anomaly with virtually no degradation of the high quality resolution of the data. (Author).
Digital Terrain Elevation Data (DTED) Anomaly Removal Through the Use of an Interactive Fourier Frequency Filtering Process
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
Book Description
The Defense Mapping Agency is a producer of raster formatted elevation data in a form called DTED (Digital Terrain Elevation Data). This data is collected from digitized source maps and from optically or digitally correlated stereopairs of photographic imagery. The various means used in producing DTED sometimes introduce a striation anomaly into the data. Conventional techniques for handling this anomaly have included the use of convolution with smoothing filters. Smoothing, however, degrades the high quality resolution of the data. A more precise method specific only to the anomaly was required. To accomplish this, an interactive Fourier frequency filtering program was designed to allow analysis and filtering of the DTED in the frequency domain. The process allows the analyst to use the data's amplitude spectrum as an aid in designing an area specific low-pass, band-reject, or fan- reject filter. This technique can result in almost total elimination of the striation anomaly with virtually no degradation of the high quality resolution of the data. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
Book Description
The Defense Mapping Agency is a producer of raster formatted elevation data in a form called DTED (Digital Terrain Elevation Data). This data is collected from digitized source maps and from optically or digitally correlated stereopairs of photographic imagery. The various means used in producing DTED sometimes introduce a striation anomaly into the data. Conventional techniques for handling this anomaly have included the use of convolution with smoothing filters. Smoothing, however, degrades the high quality resolution of the data. A more precise method specific only to the anomaly was required. To accomplish this, an interactive Fourier frequency filtering program was designed to allow analysis and filtering of the DTED in the frequency domain. The process allows the analyst to use the data's amplitude spectrum as an aid in designing an area specific low-pass, band-reject, or fan- reject filter. This technique can result in almost total elimination of the striation anomaly with virtually no degradation of the high quality resolution of the data. (Author).
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1346
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1346
Book Description
Surveying and Mapping
Author:
Publisher:
ISBN:
Category : Cartography
Languages : en
Pages : 394
Book Description
Publisher:
ISBN:
Category : Cartography
Languages : en
Pages : 394
Book Description
Surveying and Mapping
Author:
Publisher:
ISBN:
Category : Cartography
Languages : en
Pages : 742
Book Description
Publisher:
ISBN:
Category : Cartography
Languages : en
Pages : 742
Book Description
Technical Papers
Author: American Congress on Surveying and Mapping
Publisher: American Society for Photogrammetry & Remote Sensing
ISBN:
Category : Cartography
Languages : en
Pages : 852
Book Description
Publisher: American Society for Photogrammetry & Remote Sensing
ISBN:
Category : Cartography
Languages : en
Pages : 852
Book Description
Geographical Abstracts
Author:
Publisher:
ISBN:
Category : Astronautics in earth sciences
Languages : en
Pages : 492
Book Description
Publisher:
ISBN:
Category : Astronautics in earth sciences
Languages : en
Pages : 492
Book Description
Technical Papers
Author:
Publisher:
ISBN:
Category : Cartography
Languages : en
Pages : 860
Book Description
Publisher:
ISBN:
Category : Cartography
Languages : en
Pages : 860
Book Description
Government reports annual index
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 1520
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 1520
Book Description
Government Reports Annual Index: Keyword A-L
Author:
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1528
Book Description
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1528
Book Description
The Generation of a Mesoscale Terrain Data Base Using Digital Filter Techniques
Author: Patrician Ann Winters Kerr
Publisher:
ISBN:
Category : Baroclinic models
Languages : en
Pages : 170
Book Description
Publisher:
ISBN:
Category : Baroclinic models
Languages : en
Pages : 170
Book Description