DEVELOPMENT OF REMOTE SENSING-BASED PROCEDURE TO ESTIMATE BOULDER CONCENTRATION

Existing methods for estimating the percentage of boulders in bouldery soil for contract bidding purposes are inadequate. The object of this study was to investigate the capabilities of remote sensing techniques, both photographic and non-photographic, and to devise a method to increase the accuracy of boulder estimates. A procedure was developed based on testing of three sites in the precambrian shield of northern Ontario using black and white airphotos. By identifying landforms, reconstructing their geological history and determining the extent of glacial and post-glacial modification subsequent to their formation, concentration estimates can be as close as plus or minus 20%. Application is limited in areas where landforms are poorly developed or where the effects of glacial and post-glacial processes are indistinct. (Author/TRRL)

• Corporate Authors:

  Ontario Ministry of Transportation & Communic, Can

  1201 Wilson Avenue
  Downsview, Ontario M3M 1J8,   Canada 
• Publication Date: 1984-10

Media Info

• Features: Figures; Photos; References;
• Pagination: 34 p.

Subject/Index Terms

• TRT Terms: Accuracy; Aerial photography; Boulders; Estimating; General surface features of the earth; Geology; Percent; Remote sensing; Rocks; Till
• Uncontrolled Terms: Landforms
• Geographic Terms: Canada
• Old TRIS Terms: Geologic formations; Glacial deposits
• ITRD Terms: 4006: Aerial photography; 4198: Boulder clay; 8018: Canada; 4053: Geology; 4011: Glacial; 4016: Remote sensing; 4154: Rock
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00478424
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• Files: ITRD, TRIS
• Created Date: Jan 31 1989 12:00AM