| Project Methods
Overview: |
STAGE 1: GIS base
layer development (completed June, 1999).
|
- Prepared Farm and Arboretum Digital Elevation Model (DEM) from
UCSC 1961 two foot topographic survey data. Data were converted to ArcView GIS format using ArcInfo, from AutoCAD files and
paper maps digitized using MapInfo.
- Ground Control Points (GCP) were collected across the Farm and
Arboretum in locations recognizable in 1996 aerial photographs of UCSC, using a Trimble ProXR
Global Positioning System (GPS).
- DEM, GCP, and camera data were used to orthorectify a scanned
1996 aerial photograph of the farm and arboretum in ERDAS
Imagine to create a rectified imagery layers in ArcView.
- Farm soils surveyed and mapped by NRCS on topographic maps
were digitized using MapInfo
to make a soils base layer.
- ArcView
layers (imagery and DEM) were converted to MapInfo format to prepare
a basic farm management GIS.
|
STAGE 2: Farm land
management system (completed June, 1999).
|
- Supplemental GCPs were collected across the farm for field
verification of land use patterns and to facilitate future monitoring and sampling
activities.
- A fine-scale farm landscape classification system was
developed based on
ecotope
classification using terrain, management, biota, and group classes.
- 1996 and 1999 farm land use polygons, perennial vegetation
cover, and other permanent features were digitized onto rectified farm imagery in MapInfo, based on field
knowledge of management and vegetation patterns.
- Land use maps were field-verified using 1:1,500 farm map
printouts overlaid with 100 foot gridlines.
- Farm slope class grid layer derived from DEM using Vertical Mapper for MapInfo, based on NRCS
slope capability classes.
- All polygons and features given unique codes for integration
with farm management databases stored in Microsoft Excel workbooks.
- Farm management GIS product completed in MapInfo, and ported to ArcView for research use.
- Prepared poster-size maps and web page images of farm land
use, soils, terrain, and other features using MapInfo and ArcView. 3-D images
developed to illustrate interactions between farm terrain, soils and land use using Vertical Mapper.
|
STAGE 3: Natural
resource inventory and monitoring (planned).
|
- Integration of detailed farm management databases with farm
land use GIS.
- Development of precision sampling and monitoring plan.
- Grid sampling of soils. Physical, chemical and biological
measurements of soil health and natural resource stocks.
- Stratified sampling of farm vegetation. Mapping of primary
productivity and biodiversity of vegetation.
- Microclimate classification and monitoring system.
- Development of risk-based sustainable land management system.
|