Proceedings of the Symposium on Global and Environmental Monitoring: Proceedings of the Symposium on Global and Environmental Monitoring

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Multivolume work

Persistent identifier:: 856665355

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts ; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856665355

Language:: English

Document type:: Multivolume work

Volume

Persistent identifier:: 856669164

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Scope:: XIV, 912 Seiten

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856669164

Illustration:: Illustrationen, Diagramme, Karten

Signature of the source:: ZS 312(28,7,1)

Language:: English

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

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:: [FA-1 TOPOGRAPHIC ANALYSIS]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: ENVIRONMENTAL MONITORING AT A PROVINCIAL SCALE. Malcolm Gray and Fern Schultz

Document type:: Multivolume work

Structure type:: Chapter

ENVIRONMENTAL MONITORING AT A PROVINCIAL SCALE Providing GIS Compatible Thematic Data Through the Integration and Analysis of Digital Elevation Models and Satellite Imagery Malcolm Gray and Fern Schultz British Columbia Ministry of Crown Lands Surveys and Resource Mapping Branch 553 Superior Street Victoria, British Columbia, CANADA, V8V 1X5 Telephone: (604)387-1146 FAX: (604)387-3022 ABSTRACT In order to be an effective tool for provincial resource management and environmental monitoring, Geographic Information Systems (GIS’s) require access to information that is not only comprehensive, standardized, digital, and current, but is also available Province-wide. Much of the existing provincial resource mapping fails to meet one or more of these criteria. In an attempt to overcome this lack of suitable data, a method is being prototyped that uses digital topography and satellite imagery to provide a geo-referenced resource database of ground cover, present land use and topographic features. This product is called a Baseline Thematic Map. Technical obstacles which are being addressed include; registration issues (including relief displacement), classification schema definition, raster and vector format conversions, integrity of the input data and topographic segmentation of digital elevation models. The application of this mapping methodology for a large area (170 000 sq. km., 1:250 000 map scale) is discussed. Application at a scale of 1:20 000 is also discussed. Results have shown that an economically valuable database can be produced that is reliable, up-to-date and suitable for supporting regional environmental decision making. KEY WORDS: Satellite Imagery, Digital Topography, GIS, Resource Management, Thematic Mapping 1 INTRODUCTION The management of British Columbia’s natural resources is becoming an increasingly complex task. Reasons for this trend include: a shift from resource inventories to site specific management, integrated and coordinated management of multiple resources, and a requirement to more strictly monitor and regulate environmentally harmful substances and activities. Many of the issues must be addressed at a provincial level. The economic potential of Geographic Information System (GIS) technology to support planning and decision making has been realized by the Government of British Columbia. GIS technology provides resource managers with a powerful tool which has the potential to efficiently meet the requirement for information analysis. For such a tool to be effective in a manager’s ongoing activities, it requires access to resource information that is not only reliable, comprehensive, standardized, digital, and up-to-date, but is also available Province-wide. In this regard an examination of the resource mapping carried out to date in the Province leads to the conclusion that much of it is not suitable for use in a GIS. In addition it has become increasingly difficult to justify new natural resource mapping using traditional methods for two reasons: time and cost (Gray et al., 1989). In an attempt to overcome these limitations an efficient, cost effective method using presently available data sources to provide suitable geo-referenced natural resource map data is being prototyped. The final objective is a product capable of justifying a production level implementation. The method involves the production of three natural resource data bases, specifically; ground cover, present land use and topographic features. After integration into a single database the resultant product is called a Baseline Thematic Map. The databases are derived from an integration of digital topography and satellite imagery by a series of procedures involving image analysis, topographic modelling and GIS processing. 2 SPECIFIC RESPONSE TO THE REQUIREMENT FOR PROVINCE-WIDE NATURAL RESOURCE DATABASES Past pilot projects undertaken by the Surveys and Resource Mapping Branch have shown that classification of satellite imagery can meet traditional map accuracy specifications (Kenk et al., 1988). Results reported in the literature indicate that by including topographic information the number of classes mapped can be increased while maintaining map accuracy (Cibula et al., 1987). 786

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