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:: 1 Visible and infrared data. Chairman: F. Quiel, Liaison: N J. Mulder

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Thematic mapping and data analysis for resource management using the Stereo ZTS VM. Kurt H. Kreckel & George J. Jaynes

Document type:: Multivolume work

Structure type:: Chapter

Symposium on Remote Sensing for Resources Development and Environmental Management / Enschede / August 1986 37 Thematic mapping and data analysis for resource management using the Stereo ZTS VM Kurt H.Kreckel & George J.Jaynes Bausch & Lomb Inc., Rochester, N. Y, USA ABSTRACT: The new Vertical Measurement Module (VM) for the StereoZoom Transfer Scop^** permits spot and object heights and terrain elevation measurements on relatively and absolutely oriented stereo photographs. Photo X, Y, Z coordinates as well as orientation parameters may be stored and transferred to a printer, plotter, or any external computer. The Resource Measuring System (RMS 2 * * * * 7 '**) is ideally suited to accept the transferred data for the purpose of conversion into map coordinates, listing, editing, printout and the generation of thematic overlay plots on the RMS plotter at selected offsets and scales. The inherent RMS capabilities of feature analysis such as area, perimeters, X/Y location, computation, classification and statistical analyses may be applied as desired. 1 INTRODUCTION Thousands of resource managers worldwide in diverse fields from forestry, biology, geology, stream bed analysis, soil science, erosion management to the matic mapping and map revision use the Bausch & Lomb Stereo Zoom Transfer Scope (Stereo ZTS) in their daily work. The intended use of the Stereo ZTS was the capability of adding planimetric features to existing base maps. The result is a special purpose (thematic) map, or a revised map. Such applications involve the superimposition of a three dimensional virtual image created by stereo scopic viewing of aerial stereo photographs onto a map using objective lens zoom and map lens magnifi cations as well as anamorphic stretch to obtain a visual best fit between image and map. The operator then simply draws any new features contained on the photographs onto the map or overlay. The basic Stereo ZTS has served its intended pur pose, but it permits only the transfer of planimetric features in relief to a map. The third dimension was present, it could be viewed, but it could not be numerically acquired and processed. Numerous users and researchers (Weir, 1981), (Wal ker, 1984) have suggested a need to utilize the third dimension and to "acquire contours and other forms of height information" in particular in the category of instruments which are characterized by "relatively low capital cost and simple operation and maintenance". Such instruments can be operated b.y the researcher interested in obtaining results for his particular application. They do not need specialists trained - for example - in photogrammetry to operate them. A further argument has been pre sented that such instruments are needed in "small resource survey organizations in developed countries who might require some in-house plotting facilities hut feel unahle to justify the operation of a more complex photogrammetric unit". 2 Addition of the Vertical Measurement Module The development of the Vertical Measurement (VM) module for the Stereo ZTS (Fig. 1) is an answer to the need to make height and elevation measurements and to utilize them for a data base and subsequent processing in terms of editing, display, computation, hard copy and planimetric and topographic plots. The VM module being part of a new Stereo ZTS VM in strument is furthermore retrofitable to existing Stereo ZTS instruments. Figure 1. Pictorial View of the VM equipped Stereo ZTS. 3 Setup and Calibration (relative and absolute orien- ration) In its simplest form after initial setup and calibra tion the VM module uses encoder information and both keyboard entered, and computed parameters to measure spot heights and terrain elevations. Setup comprises the placement of the stereo pair of photos on the stage, proper mounting of photo graphs in photocarriers with fiducial alignment marks and principal points marks, and placement and rota tion of the mounted photographs for optimal stereo viewing alignment. Calibration allows performing relative orientation for near vertical photography by solving differential equations for six standard points using computerized procedures which are based on well known principles (von Gruber, 1924), (Hallert, B. 1960), and absolute orientation using as few as three and as many as five control points for scaling and leveling. The computations of orientation parameters are accom plished on-line by the built-in microprocessor. Corrections are passed on to the relevant drives such that the operator is not subjected to the annoyance of y-parallax and the corresponding errors in x parallax measurement. The VM module has been successfully tested using special test photography with omega and phi tilts of up to three degrees and kappa rotations of as much as ten degrees.

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