Survey Metadata


British Columbia


Reconnaissance tree top biogeochemical survey, part of NTS 92O, Fish Lake area, west central British Columbia, 1993.

Location map

(requires an Internet connection)

Survey Description

During a three-day period in May 1993, lodgepole pine tree tops were sampled by helicopter at 276 sites in the Fish Lake area on the Fraser Plateau, British Columbia.  A 1625 km2 area was surveyed along 715 km of grid lines at a spacing of 2.5 km between sample sites.  The top 0.5 m (stem, branches, needles and cones) comprising 2-3 years of growth was collected from a healthy tree at each sample site.  The fresh weight of each sample varied from 500 g to 1 kg.  Wherever possible, a tree top was sampled within a 200 m radius of the preferred site.  The only departures from the pre-assigned grid were due to recent burns, pine beetle kill, bogs and complex multi-storied, multi-species stands.  Production was 22 sites/hour (2.75 minutes/sample) when flying along preset grid lines.  The data are published in GSC Open File 2839.

Publication History

Index Publication
1 Dunn, C.E., Balma, R.G., Spirito, W.A. (1994). Reconnaissance biogeochemical survey using Lodgepole pine tops: Fish Lake area (NTS 92 O), west-central British Columbia. Geological Survey of Canada, Open File 2839. (more)

Project History

Index Year Project
1 1992-1994 Fish Lake area, British Columbia vegetation surveys, 1992 and 1993 (more)

Downloadable Files

Index Description Size (bytes)
Diskette to accompany GSC Open File 2839 ( FileID=253 download)
This diskette contains two versions of the digital data for GSC Open file 2839.  OF2839.DAT contains the data in RBASE UNLOAD format.  It is an ASCII file.  It can be read into an RBASE database, by using the command "INPUT OF2839.DAT".  OF2839.DBF is a dBASE-compatible version of the same file.  It is a binary file.  It can be read by any DBASE-compatible software.
Introductory text for GSC Open File 2839 ( FileID=611 download)
This PDF file contains the introductory text for GSC Open File 2839.  It was scanned from the original document.  The data are not included in this file.

Geographic Extent

Minimum Latitude Maximum Latitude Minimum Longitude Maximum Longitude
51.36° 51.9° -123.87° -123.29°

The geographic extent of the survey is defined by the following polygons:

  • Covers part of NTS 92O, Fish Lake area, west-central British Columbia.


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