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Title
Proceedings of the Symposium on Global and Environmental Monitoring

PROPOSED MULTI RESOURCE INVENTORY MODEL
Basic components of a generalized multi resource inventory model include the following:
• planimetric and/or topographic (base) maps and data
• cadastre (legal and administrative) maps and data
• forest resource inventory maps and data
• non-forest resource inventory maps and data
• socioeconomic maps and data
Processes within the above categories generate a multi resource inventory data base. As soon as such data are
compiled, there is a high probability that it will become out of date due to changes such as depletions or
growth. Hence, two new components are introduced next into the generalized model:
• projection over time with growth models
• update with remote sensing
These two processes yield a dynamic multi resource inventory data base, which may either become the new
updated data base or used in applications. Due to recent advances in technology, new land information
products can be generated, such as color enhanced three-dimensional thematic maps featuring alternative land
use options. Geographic Information Systems (GIS), combined with mathematical models provide the tools
to manipulate the current land information.
This new generalized resource inventory model is capable of providing the essential land information to a wide
range of clients, such as:
• managers of forest resources
• users of forest resources
• service agencies
• environment protection and conservation groups
Details of the above processes may further be generalized as follows.
ACQUISITION OF PLANIMETRIC AND/OR TOPOGRAPHIC MAPS AND DATA
Current practices in Canada use maps and data which were collected over time, hence they contain a range
of accuracy levels. As new planimetric and/or topographic maps become available, previously registered
thematic forest inventory information may not fit the new base. Adjustments with GIS, such as stretching,
"rubber sheeting" and other applicable techniques have proven to retain high levels of error. Hence it is
recommended that as new and more accurate base maps become available, the multi resource inventory be
acquired from new aerial photography which must then be registered to the new base map.
ACQUISITION OF CADASTRAL MAPS AND DATA
The major challenges in this process are the integration, with GIS, the data sources which represent different
levels of accuracy. This is especially important in cases where the compiled boundaries may be subject to
queries from the legal system. In addition, this process may obtain data from several agencies, using
incompatible tolerance levels in terms of accuracy and amount of details.
Once the necessary data is acquired, it must be kept current. Hence, cost effective and timely updating
procedures must be an integral part of a multi resource inventory model.
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