1968 Planimetrics-Kelso/Longview

Section Index

Identification Information

Citation:
Citation Information:
Originator: Cowlitz County GIS Department
Publication Date: 1968
Title: 1968 Planimetrics-Kelso/Longview
Geospatial Data Presentation Form: map
Publication Information:
Publication Place: Kelso, WA
Publisher: Cowlitz County GIS Department
Description:
Abstract:
Planimetric information for Cowlitz County consists of a comprehensive set of digital features stereo-digitized from five (5) ortho photography contracts flown in 1968(1), 1995(1) and 1996(3). The level of planimetric detail derived from these flights varies from project to project based on three contracted map scale accuracies of 1"=50' (1:600), 1"=100' (1:1200) and 1"=200' (1:2400). Typical planimetric features consists of natural and cultural features as water bodies, road improvements, building foot prints and utilities. The 1968 planimetrics that cover major portions of the cities of Kelso and Longview and the planimetrics that cover portions of Kalama City (flown in 1996) are more comprehensive than those generally produced in 1995 and 1996.
Purpose:
Planimetric data provides a threefold purpose: 1. To assist base mapping efforts by defining the location and boundaries of physical and cultural features 2. To assist in cadastral mapping by providing a means to interpret legal descriptions of deeds that often call out physically defined planimetric features and 3. To capture the location, type and height of various utilities to support various AM/FM(automated mapping-facility management) applications.
Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: 1968
Currentness Reference: publication date
Status:
Progress: Complete
Maintenance and Update Frequency: Publication Date
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: 123.04317
East Bounding Coordinate: 122.85928
North Bounding Coordinate: 46.20178
South Bounding Coordinate: 46.07857
Keywords:
Theme:
Theme Keyword Thesaurus: None
Theme Keyword: Photogrametric
Theme Keyword: Photogrametry
Theme Keyword: Planimetrics
Theme Keyword: Planimetry
Place:
Place Keyword Thesaurus: None
Place Keyword: Cowlitz County
Place Keyword: Washington
Place Keyword: Washington State
Access Constraints: None for off line access. On-line access to this data is restricted to departments of Cowlitz County Government.
Use Constraints: None
Point of Contact:
Contact Information:
Contact Person Primary:
Contact Person: Chris Schaefer
Contact Organization: Cowlitz County GIS Department
Contact Position: GIS Manager
Contact Address:
Address Type: mailing address
Address: 207 4th Ave.,North
City: Kelso
State or Province: WA
Postal Code: 98626
Contact Voice Telephone: (360) 577-3025
Contact Facsimile Telephone: 360 423-9986
Contact Electronic Mail Address: SchaeferC@Co.Cowlitz.Wa.US
Hours of Service: 8-5 WST
Contact Instructions: Additional contact persons: George Bradford, PLS (GIS Surveyor) or Doug Willoughby (GIS Deputy Manager); Phone (360) 577-3025
Browse Graphic:
Browse Graphic File Name: Plan_GPS.jpeg
Browse Graphic File Description: Cowlitz County Aerial Photo/Planimetry Project Boundaries
Browse Graphic File Type: JPEG
Native Data Set Environment: ArcInfo(R), Autocad(R), running on Window(R) NT4.0.

Data Quality Information

Attribute Accuracy:
Attribute Accuracy Report:
Typically, only cursory review has been conducted to check attribute accuracy globally beyond the QC/QA checks conducted by the contractor. Attribute test were limited to color coding the attribute, plotting the results and comparing against internal public record. More detailed checking is commonly conducted by either field checks, photos, and or office records and maps by jurisdictional entities only as the data is used.
Logical Consistency Report: Data set is topologically structured line, point and polygon data with nodes at all intersections.
Completeness Report: The data set is complete according to the scope of the original contracts for planimetric data. However the scope of work differs from project to project.
Positional Accuracy:
Horizontal Positional lar
Source Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: 1968
Source Currentness Reference: publication date
Source Citation Abbreviation: Plan68
Source Contribution: Planimetrics
Process Step:
Process Description:
By contract the 1968 planimetrics were originally produced from two separate aerial photo flights at 1:100 (1:1200) and 1:200 (1:2400) map scale that covered the Kelso/Longview, Wa. urban area. For the 1"=100' mapping areas, nearly all physical and cultural features were photogrametrically captured. For the 1"=200' map areas, basic planimetric detail was mapped. Both map products were produced on ink on 18"x30" mylar map sheets. A second contract completed in 1993 digitally converted to vector format each 1"=100" and 1"=200' mylar planimetric map by a. first scanning each mylar sheet at 1"=300 dpi resolution and b. then heads up digitizing each planimetric feature.
Process Date: 1968 and 1993