New Age Forestry Inventory Mapping
New Age Forestry Inventory Mapping …what you see in stereo is what you map in 3D…
Patrick Wong, Principal.
Inventory Mapping…the way we were…
Inventory Mapping – the Old-fashioned Way 1. Field reconnaissance…dead-reckoning air/ground calls 2. Stereoscopic studies of aerial photos…maximum magnification ~3.5X 3. Inking polygons/features onto contact print…rapid-o-graph pen 4. Tree height & other measurements…step-wedges, parallax bar, dot grids… 5. Polygon transfers onto base maps… slotted templates, Kail Plotter, epidiascope, zoom transfer-scope, camera lucida… 6. 2D digitizing of map manuscript…scanning or CAD re-digitizing 7. Geo-processing 2D CAD files…2D GIS…at best
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x
Geometry of digital photogrammetry
Old Mapping Method…
x
Stereoscopic studies of aerial photos
Inking polygons/features onto contact print Approximate object height measurements Approximate polygon transfers onto base maps 2D digitizing of map manuscript
Geo-processing the 2D CAD files
x
Old Field Method… Air/ground calls/plots by “dead reckoning”
New Method: Training/Test Sets by GPS
British Columbia Ministry of Forests 2D Forest Cover FC-1 Maps now viewable and editable in ArcMap
3D geodatabase-direct
x
Patrick Wong, Principal.
Inventory Mapping…the way we were…
Inventory Mapping – the Old-fashioned Way 1. Field reconnaissance…dead-reckoning air/ground calls 2. Stereoscopic studies of aerial photos…maximum magnification ~3.5X 3. Inking polygons/features onto contact print…rapid-o-graph pen 4. Tree height & other measurements…step-wedges, parallax bar, dot grids… 5. Polygon transfers onto base maps… slotted templates, Kail Plotter, epidiascope, zoom transfer-scope, camera lucida… 6. 2D digitizing of map manuscript…scanning or CAD re-digitizing 7. Geo-processing 2D CAD files…2D GIS…at best
x
x
Geometry of digital photogrammetry
Old Mapping Method…
x
Stereoscopic studies of aerial photos
Inking polygons/features onto contact print Approximate object height measurements Approximate polygon transfers onto base maps 2D digitizing of map manuscript
Geo-processing the 2D CAD files
x
Old Field Method… Air/ground calls/plots by “dead reckoning”
New Method: Training/Test Sets by GPS
British Columbia Ministry of Forests 2D Forest Cover FC-1 Maps now viewable and editable in ArcMap
3D geodatabase-direct
x
