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

damen, m. c. j.

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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:: 856641294

Title:: Remote sensing for resources development and environmental management

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

Scope:: IX Seiten, Seiten 551-956

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A,. A. Balkema

Identifier (digital):: 856641294

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(26,7,2)

Language:: English

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

Editor:: Damen, M. C. J.

Editor:: International Society for Photogrammetry and Remote Sensing, Commission of Photographic and Remote Sensing Data

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:: 8 Geo-information systems. Chairman: J. J. Nossin

Write comment:: Wegen zu enger Bindung kommt es teilweise im Original zu Textverlust.

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Land suitability mapping with a microcomputer using fuzzy string. J. P. Wind & N. J. Mulder

Document type:: Multivolume work

Structure type:: Chapter

LAND SUITABILITY MBPS SLOPE X DEFINE ATTRIBUTE TABLE ^|S? E T^iiy iNG TflBLES MAT OH TABLES »DISPLAY MRPS PRINT MAPS MAP DIGITIZING CENTROID NAMES DIRECTORY STOP UB1 B.0-2.8 UB2 8.0-2.0 UB3 0.0-2.0 TM AA AO AC RE AU EM 0.0-2.8 0.0-2.8 2.0-8.8 25.8- 55.8 8.8- 2.0 8.8-2.8 2.8-8.8 8.0-16.8 16.8-25.8 Figure 2.1 Menu choice by cursor movement (black box is cursor). Fig. 2.5 Values of attribute ’slope’ per landunit, displayed on screen. red blue yellow Fig. 2.2 Possible colours and patterns DEFINE ATTRIBUTE TABLE NEW TABLE EDIT TABLE ■DISPLAY TABLE LOAD TABLE STOP Fig. 2.3 Function choice by cursor DISPLAY TABLE SLOPE X 8.8-2.8 2.0-8.0 8.0-16.0 16.0- 25.8 25.0- 55.0 Fig. 2.4 Attributee from attribute table with its values displayed on a screen. h. Overlay the land suitability map with any required line or symbol information. i. Desing the colour legend. ,j. Save the colour coded suitability map as an image< file for further processing or hardcopy production. k. Future extension: kl: the map unit unit attributes contain numerical values like: soil-depth= 17 (cm) k2: the crop requirement attributes contain an expression to be evaluated like: IF soil-depth > 12 or soil-depth < 32 THEN condition=TRUE Match is TRUE if all attribute requirements evaluate to TRUE (AND of all partial evaluations). REMARKS: EXPERT SYSTEM. In putting an expression evaluator in the table of required attributes we have implemented an expert system for land suitability evaluation. The program evaluating the expression for attributes required is in fact a rule intepretor. The table with map units and attributes together with the polygon data form the geographical data base. The table with required attributes for crop suitability classes forms the actual rule base or knowledge base. 2. HOW DOES IT LOOK LIKE. In this section different screen dumps are shown of the actual presentation. Every choice that must be made is done by displaying the possible choices on the screen in a menu and indicating the choice by moving the cursor up and down (see fig. 2.1). 2.a Map digitizing and editing. Map digitizing is done by so called "free digitizing". This means that lines are not stored as vectors, but the entire image is saved pixel by pixel. It also can be stored by run length coding, bo tnere is no line indication. To delete a line or a polygon a square rubber can be put on the screen which can be moved by the cursor on the tablet to what must be deleted. By pressing one of the buttons the area under the rubber is deleted (i.e. becomes black/white). One can choose between three rubber sizes. To plot a line three colors can be choosen. To fill a polygon with a color, a color fill subroutine is written which fills a polygon from the centroid with a color pattern (for color pattern see figure 2.2). Once a polygon is actually filled it can not be filled with another pattern. The digitized map can be printed on a color inkjet printer in two sizes using the full or the half width of the paper. 2.b Attribute definition. To make a land unit table (table I, section 1) and a crop requirements table (table II, section 1) first an attribute table has to be made. By cursor movement one of the functions (figure 2.3) can be choosen. A new table can be defined or an existing table edited. For each attribute its values are asked. The values are stored as strings. Each attribute and its values can be shown on the screen (figure 2.4).

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