{ "culture": "en-US", "name": "", "guid": "", "catalogPath": "", "snippet": "The contour interval represents a best compromise between the vertical and horizontal accuracy of the source data and the need for a general use cartographic and analysis product. At the contour interval indicated for a given tile the data provide a reasonable depiction of the general shape of the land useful for determining general landform, slope, and elevation. As, by nature, LiDAR data contain some percent of non-ground points, the contours cannot be considered absolute or without error. The index contour attributes allow the data to be reselected or symbolized to display less detail for smaller scale areas.", "description": "

Contour isolines with interval in feet as defined by numerical suffix to data tile. For example t22r04_ctr005 indicates contours for the township 24, range 04 tile with a 5-foot contour interval. Zone and region layers are constructed with a greater contour interval such as _ctr010 representing a 10-foot contour interval. All tiles have identical attribute structures with defined index contours. For file name consistency all township tiles are titled with a 005 suffix. However, due to software-limitations in processing and display restrictions not all tiles contain five-foot contours. For Range 2 through 7, tiles contain five-foot contours, regardless of elevation range. For Range 8 through 14, tiles do not contain five-foot contours for elevation ranges greater than 1000. This means that for tiles where all elevations are greater than 1000 there will be no five foot contours. This 1000-foot demarcation was used to reduce file size and improve drawing performance in elevated, high-relief areas while still providing adequate topographic definition. The 1000-ft breakover point was also chosen as a rough urban/rural dividing line. These contours were derived from the digital ground model grid lattice (DGM) developed initially from the mass point LiDAR file, as detailed in the Process section. As several processing steps were involved, including smoothing and artifact removal, these contours are provided only as an interpretation of the earth's surface and do not meet the definition of topography per chapter 18.43 of the Revised Code of Washington. These contours do not depict the topography relative to any particular property. Any use of this information without additional verification by competent professionals is inappropriate.<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "summary": "The contour interval represents a best compromise between the vertical and horizontal accuracy of the source data and the need for a general use cartographic and analysis product. At the contour interval indicated for a given tile the data provide a reasonable depiction of the general shape of the land useful for determining general landform, slope, and elevation. As, by nature, LiDAR data contain some percent of non-ground points, the contours cannot be considered absolute or without error. The index contour attributes allow the data to be reselected or symbolized to display less detail for smaller scale areas.", "title": "Five (5) foot-interval index contour isolines for townships and the entire county. Index contours selected from 5 foot contours(10 foot, 20 foot, 40 foot, 50 foot & 100 foot) for entire county.", "tags": [ "bathymetry", "topo", "Digital Ground Model (DGM)", "Contours", "LiDAR digital elevation data", "Washington state", "Elevation data", "Pacific NW", "King County", "WA", "Bare-Earth", "Seattle", "Virtually Deforested" ], "type": "", "typeKeywords": [], "thumbnail": "", "url": "", "minScale": 150000000, "maxScale": 5000, "spatialReference": "", "accessInformation": "", "licenseInfo": "

King County data are made available with the understanding that they shall be used exclusively by the obtainer or his/her authorized agents. Digital products may not be reproduced or redistributed in any form or by any means without the express written authorization of King County. These contours are based upon LiDAR returns which inherently contain some \"non ground-surface\" values. In addition, the contours were smoothed, as outlined in the Process Section, to create a more traditional cartographic product. As such, these contours represent only the general shape of the land and do not meet the definition of topography per chapter 18.43 of the Revised Code of Washington. These contours do not depict the topography relative to any particular property. Any use of this information without additional verification by competent professionals is inappropriate.<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>" }