Remote sensing for resources development and environmental management: Remote sensing for resources development and environmental management

Damen, M. C. J.

Bibliographic data

Multivolume work

Persistent identifier:: 856342815

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856342815

Language:: English

Additional Notes:: Volume 1-3 erschienen von 1986-1988

Editor:: Damen, M. C. J.

Document type:: Multivolume work

Volume

Persistent identifier:: 856343064

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Scope:: XV, 547 Seiten

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856343064

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(26,7,1)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Damen, M. C. J.

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: 2 Microwave data. Chairman: N. Lannelongue, Liaison: L. Krul

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Digital elevation modeling with stereo SIR-B image data. R. Simard, F. Plourde & T. Toutin

Document type:: Multivolume work

Structure type:: Chapter

ts related to South-Haiti. on both data ortant on the are easier to Symposium on Remote Sensing for Resources Development and Environmental Management / Enschede / August 1986 Digital elevation modeling with stereo SIR-B image data obtained by in 1984 were f Haiti. Two of La Gonave ries between basalts were 2) ancients ults oriented nticline and rated in the plate. générale et [aiti. Trav. Hautes Etudes r I, 194 p., mt senestre conséquences i région de prequ'île du >1. Nord, t C Holt and M. .maging radar >r: the SIR-B 16-20. tebillard, J. 1 J.M. Vila irale de l'île .ti) à partir ISS et Seasat iraibes symp., )83. Analysis it and SIR-A )es. Geophys. Calmus, B. m Den Berghe Gi rault ed.), R.Simard Canada Centre for Remote Sensing, Ottawa F.Plourde & T.Toutin DIGIM, Montréal Canada ABSTRACT: A stereo SIR-B image data set has been used to produce a digital elevation model (DEM) for a test site located in the Mount Shasta area in California. The stereo pair was formed with images acquired at 53 and 29 degree incidence angles, both on the same side. A digital method has been developed for the extraction of differential parallaxes which relies mainly on a hierarchical nested zoomed correlation procedure. The efficiency of the proposed method for automatic production of DEM is investigated in relation to terrain and SAR parameters. 1 INTRODUCTION The possibility of deriving elevation data from stereoscopic radar images has been investigated in the past mainly in relation to geometry information necessary for adequate terrain modeling (Leberl et al, 1985; Derenyi and Stuart, 1984) . It has been shown that radargrammetry offers possibilities for accurate terrain mapping under certain conditions, but it is generally more difficult to achieve, compared to traditional photogrammetry, due primarly to the inherent geometric and radiometric characteristics of radar images especially those derived from aircraft systems. To date the question has been addressed using analog or hybrid analog/digital plotter equipment requiring film products and operator visual interaction. The second Shuttle Imaging Radar (SIR-B) experiment offered for the first time the possibility to investigate the use of digital techniques for terrain modeling with spaceborne multi-incidence angle and digital L-band (synthetic aperture radar) SAR images (the SIR-B Science...,1984). The present research paper concerns results on the evaluation of a method developed at the Canada Centre for Remote Sensing for production of digital elevation models from SIR-B data. The method had been primarily developed for processing visible/infrared (VIS/IR) imagery such as that from LANDSAT or SPOT satellites (Simard and Krishna, 1983; Simard, 1982) but has been refined in order to effectively account for geometic and radiometric differences between VIS/IR and SAR images. A test site was selected in the rugged topographic area of Mt. Shasta in California (lat/long » 41° 53'N/122° 52'W) where elevations range approximately from 500 to 2200 metres above sea level. The Mt. Shasta site is also very well known from the production of a SIR-B perspective view movie presented at the JPL SIR-B Workshop (Kobrlck, 1985) . SIR-B image data acquired in October 1984 at the two incidence angles of 29 and 53 degrees were investigated for automatic DEM production. Basically, the overall process was divided into four main steps: geometric and radiometric preprocessing, automatic stereo image matching, three-dimensional modeling (ray intersection) and orthographic DEM/SIR-B image production. Precise image correction and geometric modeling have been made possible by using few ground control points, (GCPs) digitized from 1:62500 scale topographical maps, together with post flight ephemeris data (OPS onorbit postflight...,1983) sampled every 10 seconds. 2 GEOMETRIC AND RADIOMETRIC PREPROCESSING The SIR-B image data were digitally processed at JPL (Curlander, 1984; the SIR-B science...,1984) with a four look 12.5 metre pixel size (in ground range representation). However in order to smooth the image statistics, the input images were averaged to square 25 metre pixels using a 2 x 2 adjacent cell. The geometric rectification of raw imagery has been done by using external parameters including GCPs and shuttle orbital parameters defined by position and velocity vectors. The rectification procedure consisted of moulding the imagery to a quasi-cartographic projection leaving uncorrected the parallax effect only. By this mean, both 29 and 53 degree incidence angle images were s \ I o Figure 1. SIR-B range viewing geometry.

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