Keywords
Theme:
GIS, geodata, map, shapefile, geographic, creeks, streams, water ways, rivers, riparian, hydrology
Place:
San Luis Obispo, Central California, SLO, Central Coast, Coastal California, Santa Lucia Range, Morros, Cal Poly, California Polytechnic University, Hwy 101, Hwy 1, Hwy 227
Description
Abstract
This layer is a map of creeks within the San Luis Obispo
Watershed. Fields includes unofficial names and creek type information.
_________________
Status of the data
Complete
Data update frequency:
As needed
Publication Information
Who created the data: City of San Luis Obispo, Public Works Department, GeoData Sevices
Date and time:
20000505
Publisher and place:
GeoData Sevices, Public Works Department, City of San Luis Obispo
_________________
Data storage and access information
File name: creeks
Type of data: vector digital data
Location of the data:
http://www.slocity.org
Data processing environment: Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 3; ESRI ArcCatalog 8.3.0.800
Accessing the data
Size of the data: 0.925 MB
Data transfer size: 0.925 MB
Constraints on accessing and using the data
Use constraints:
NOT FOR LEGAL USE. The location and attribute information
shown may not be accurate or reflect the legal status and
should be used as a reference only.
Details about this document
Contents last updated: 20031009
at time 10262700
Who completed this document
Mary Andrews
GeoData Services, Public Works Department, City of San Luis Obispo
Mailing and physical address:
San Luis Obispo, CA 93401-3208
U.S.A.
(805) 781-7160 (voice)
(805) 781-7167 (fax)
mandrews@slocity.org
Hours of service:
Monday-Friday, 8:00 AM-5:00 PM, Pacific Standard Time
Standards used to create this document
Standard name: FGDC Content Standards for Digital Geospatial Metadata
Standard version: FGDC-STD-001-1998
Time convention used in this document: local time
Metadata profiles defining additonal information
ESRI Metadata Profile: http://www.esri.com/metadata/esriprof80.html
Horizontal coordinate system
Projected coordinate system name: NAD_1983_California_V
Geographic coordinate system name: GCS_North_American_1983
Details
Map Projection Name: Lambert Conformal Conic
Standard Parallel: 34.033333
Standard Parallel: 35.466667
Longitude of Central Meridian: -118.000000
Latitude of Projection Origin: 33.500000
False Easting: 2000000.000000
False Northing: 500000.000000
Planar Coordinate Information
Planar Distance Units: meters
Coordinate Encoding Method: coordinate pair
Coordinate Representation
Abscissa Resolution: 0.000032
Ordinate Resolution: 0.000032
Geodetic Model
Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257222
_________________
Bounding coordinates
Horizontal
In decimal degrees
West:
-120.733272
East:
-120.619969
North:
35.325239
South:
35.205864
In projected or local coordinates
Left: 1751506.250000
Right: 1761473.375000
Top: 705582.937500
Bottom: 692600.125000
_________________
Spatial data quality
Horizontal positional accuracy
The original GPS survey conducted by Hunsaker & Associates
in 1990 used the control point "Monterey" as the primary
horizontal control. That point had a coordinate and scaling
factor established for the NAD 83. Additional stations
called "KSLY" and "KVEC", also having coordinates
established by Caltrans, were also used to provide
horizontal control. 15 additional primary and 132 secondary
control points were established for horizontal control by
Hunsaker & Associates. These points were each assigned a
horizontal coordinate, a convergence and a scale factor.
The City staff in-filled between these points to establish
the centerline street system on the same horizontal basis.
Traverses were run between control points tying in points
with the subdivisions. Distances measured were adjusted by
scale factors. While every point in the map does not have a
first or second order coordinate, all points relate by
survey to a first or second level control point established
by Hunsaker & Associates. The
City's 1990 horizontal control points were converted to the
metric NAD 83 (1992) datum based on a survey and report
generated for the City by Penfield & Smith in August 1996.
The following steps were used to convert the points:
1. The City's 1990 control points were first converted to
metric units by applying a conversion factor of
0.3048006096. This was done by scaling an Autocad drawing
file containing the City's control network. 2.
The control network was then translated (using City's pt.
no. 201-"Monterey"as a reference) to the published NAD
83(1992) coordinate of said point. (This was possible
because the scale factor for both the 1983 and 1992 systems
is the same.) 3.
The City's control network was then rotated so that the
azimuth between the City's newly translated "Monterey" and
"KVEC" was equal to the NAD83(92) based azimuth between
Monterey and KVEC established by Penfield & Smith. The
NAD83(92) coordinates for Monterey and KVEC are shown on
the attached excerpt from Penfield & Smith.
_________________
Spatial data description
Vector data information
ESRI description
creeks
ESRI feature type: Simple
Geometry type: Polyline
Topology: FALSE
Feature count: 857
Spatial Index: TRUE
Linear referencing: FALSE
SDTS description
Feature class: SDTS feature type, feature count
creeks:
String, 857