Field data for the Vegetation Mapping Inventory Project of Lewis and Clark National Historical Park

This reference is an assemblage of field data collected as part the baseline vegetation inventory for the park unit. Typical files here are vegetation plot data, accuracy assessment data, field photos, PDF showing locations of vegetation plots and accuracy assessment data, and other data for this type. Vegetation classification data was collected in 2009 and 2010. ORBIC field staff were provided with GPS units with base imagery and the initial eCognition polygon map created for the mapping project (see Mapping Methods section for details). Color print-outs were also provided to aid in field sampling. The field crew navigated to the interior of a polygon, used the field alliance key to determine the vegetation type, and collected a GPS point at the location using Garmin eTrex GPS units in the NAD 83 geodetic datum. Relevant habitat descriptions or plot notes were also recorded. At the next change in vegetation type, this process was repeated. The sampling was a progressive census, with field sampling focused on navigating to as many accessible plots across a variety of habitat types as was possible. Following the initial sampling, specific environments were then targeted, determined by imagery and knowledge of the park units, rather than walking transects. It was felt this approach was a better use of field time than spending many hours reaching difficult to access areas that were vegetatively homogenous. Under-sampled areas and habitats were given higher priority for field visits. Locations that did not easily fit into an existing classification were given provisional names.

Field data for the Vegetation Mapping Inventory Project of Lewis and Clark National Historical Park

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