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Generalized cartographic contour isolines.

These contours have been derived from a wide range of primary source data and are only as accurate as that source data.

They are derived from 30 foot resolution data and are useful only for determining general elevation trend and for cartographic display.

Generalized 20-foot contour isolines derived from Puget Sound lowlands combined bathymetry and elevation digital elevation model.

Layer Name	reg_psctr020_line
Subject Category	Topography
Title	Puget Sound 20-Foot Contours
Feature Count	292463
Feature Type	Line
Next Update	As needed
Spatial reference	EPSG:2926
Control ID	179
Place Keywords	Pacific NW, King County, WA, Washington State
Theme Keywords	Topo, Bathymetry, Elevation
Supplemental Information	None

OBJECTID From ESRI	Description Internal feature number. Domain Sequential unique whole numbers that are automatically generated.
ELEVATION No Source Noted	Description Not Found Domain -960 to 7760 by 1
IDX_MINOR No Source Noted	Description Not Found Domain 0.00000000 to 10.00000000 by
IDX_20FT No Source Noted	Description Not Found Domain 0.00000000 to 1000.00000000 by
IDX_40FT No Source Noted	Description Not Found Domain 0.00000000 to 1000.00000000 by
IDX_100FT No Source Noted	Description Not Found Domain 0.00000000 to 1000.00000000 by
IDX_50FT No Source Noted	Description Not Found Domain 0.00000000 to 1000.00000000 by
Shape From ESRI	Description Feature geometry. Domain Coordinates defining the features.
SHAPE From ESRI	Description Feature geometry. Domain Coordinates defining the features.

Maintained by	KCGIS Center
Primary	KCGIS Center giscenter@kingcounty.gov

License	Terms of use and copyright

Links How to use in ArcGIS Pro
Sharing Status	Public

Generalized cartographic contour isolines.

These contours have been derived from a wide range of primary source data and are only as accurate as that source data.

They are derived from 30 foot resolution data and are useful only for determining general elevation trend and for cartographic display.

Generalized 20-foot contour isolines derived from Puget Sound lowlands combined bathymetry and elevation digital elevation model.

Maintained by	KCGIS Center
Primary	KCGIS Center giscenter@kingcounty.gov

License	Terms of use and copyright

12/1/2005	ArcInfo 9.0 Workstation LATTICECONTOUR command used with following arguements: interval (20), base_contour (-1000), contour_item (elevation), weed_tolerance (#), z_factor (#). Resulting coverage inspected in ArcGIS and exported to shapefile format to Spatial Data Warehouse.
12/1/2005	Downloaded and unzipped psdem_2005.asc from <http://www.ocean.washington.edu/data/pugetsound/psdem2005.html>
12/1/2005	Used ArcInfo 9.0 workstation ASCIIGRID command to convert ascii-formatted file to ESRI grid format
12/1/2005	Use ArcInfo 9.0 workstation PROJECTDEFINE to establish Washington State Plane North, NAD 83, units Feet projection header. Used PROJECTGRID command to reproject grid to HARN.