Layer: Buoy (ID: 0)

Name: Buoy

Display Field: date

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: <DIV STYLE="text-align:Left;"><DIV><DIV>This layer contains the locations of all buoys in Lake Tahoe. This data was collected using GPS devices during the Summer of 2016. CA Method: Data represents GPS/GNSS location data and associated attributes for mooring floats (buoys) on the California side of Lake Tahoe’s shorezone (El Dorado County and Placer County). Field data were collected in July and August of 2016 using a blue-tooth enabled Bad Elf Surveyor GPS/GNSS unit with attributes logged into a custom Fulcrum application (fulcrumapp.com). The software applications for the GPS/GNSS unit (Bad Elf) and Fulcrum app were supported/maintained using an Apple iPad mini tablet (iOS 9.3.5). The Bad Elf Surveyor GPS/GNSS unit used was equipped with a real-time differential correction (56 channel receiver that supports GPS (US) and QZSS (Japan) constellations with SBAS (WAAS/EGNOS/MSAS). Overall horizontal accuracy (HDOP) was assessed from .gpx data records representing stationary positions to be 0.927m (SDev=0.247m, n=140143, max=10m, min=0.6m). Field data were collected and processed by Spatial Informatics Group, LLC as a contract deliverable for the Tahoe Regional Planning Agency and the California State Lands Commission.NV Method: 1. Prepare GPS devices for use (These instructions are explained in detail and located here: F:\GIS\DOCUMENTATION\GPSUnits\TrimbleGeoXH\GPS Manuals)2. Prepare the kayak<OL STYLE="margin:0 0 0 0;padding:0 0 0 0;"><LI>Tie rope to the kayak leaving about three feet of rope free to use to attach the kayak to buoys while taking their GPS locations. </LI><LI>Attach a carabiner to the loose end of the rope. This will be used for clipping the rope to the buoys to help the kayak stay near the buoys when obtaining the GPS location.</LI><LI>Pack water, food, sunscreen and the biodegradable washable crayon onto the kayak</LI><LI>Attach the GPS device to a rope (or similar) to create a sling to wrap around your person to ensure the GPS device does not fall into the water while kayaking.</LI></OL>3. Collecting buoy GPS locations<OL STYLE="margin:0 0 0 0;padding:0 0 0 0;"><LI>Approach buoys using the kayaks being careful not to hit any other watercrafts on the lake.</LI><LI>Use the carabiner attached to the rope to clip onto the chains of the buoys.</LI><LI>Obtain the GPS location of the buoys (process explained in the GPS Manuals folder referenced in step 1)</LI><LI>Once the GPS location is received, demarcate the buoy with a small “X” to ensure the buoy is not double-counted.</LI><LI>Detach carabiner from the buoy and continue to the next buoy.</LI></OL>4. Post-processing data (process explained in the GPS Manuals folder referenced in step 1)TRPA collected all the buoy locations for the NV in 14 days.Attribute Description: The following provides a description of column contents represented in the point feature attribute table:FID - unique record identifier provided by ArcGIS.Shape - Type of shapefile.<UL STYLE="margin:0 0 0 0;padding:0 0 0 0;"><LI>Date - Date location coordinates were recorded.</LI></UL>Lake_zone - the name of the general on-shore location where the mooring exists.buoy_field - the field personnel's perspective of whether the mooring is part of a buoy field ('yes') or not ('no').<UL STYLE="margin:0 0 0 0;padding:0 0 0 0;"><LI>field_note - notes of other field observations</LI><LI>FieldPers - Persons recording data in the field.</LI><LI>Buoy_Type - For CA, the field personnel's perspective of whether the mooring is used for mooring a 'boat' or for mooring a personal watercraft (‘PWC’). For NV, the field personnel's perspective of whether the mooring is used for mooring a 'boat', "Jetski", or "Other".</LI><LI>Horz_Prec - Horizonat accuracy (Meters) (NV only)</LI><LI>Std_Dev - Standard deviation of GPS points. (NV Only)</LI><LI>Point_ID - Unique Point ID provided by Trimble.</LI></UL>X – WGS84 longitude coordinates in decimal degrees of mooring points.Y – WGS84 latitude coordinates in decimal degrees of mooring points <UL STYLE="margin:0 0 0 0;padding:0 0 0 0;"><LI></LI><LI></LI></UL></DIV></DIV></DIV>

Service Item Id: 09033f0f66a545cf8ef5fd09a4720616

Copyright Text: location: F:\GIS\GIS_DATA\shorezone\ShorelineUpdate2015\AllTahoeBuoys2016.shp Primary Contact: The Tahoe Regional Planning Agency - GIS Department should be contacted with questions or comments on the data (gis@trpa.org) CA point dataset credit: Data were collected in July and August 2016 and the GIS dataset was prepared by Spatial Informatics Group, LLC by Shane Romsos, Andrew Theil and Jason Rogers as a contract deliverable for the Tahoe Regional Planning Agency and California State Lands Commission.

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Fields:

OBJECTID ( type: esriFieldTypeOID, alias: FID )
date ( type: esriFieldTypeString, alias: date, length: 254 )
lake_zone ( type: esriFieldTypeString, alias: lake_zone, length: 254 )
buoy_field ( type: esriFieldTypeString, alias: buoy_field, length: 254 )
field_note ( type: esriFieldTypeString, alias: field_note, length: 254 )
FieldPers ( type: esriFieldTypeString, alias: FieldPers, length: 30 )
Buoy_Type ( type: esriFieldTypeString, alias: Buoy_Type, length: 60 )
Horz_Prec ( type: esriFieldTypeDouble, alias: Horz_Prec )
Std_Dev ( type: esriFieldTypeDouble, alias: Std_Dev )
Point_ID ( type: esriFieldTypeInteger, alias: Point_ID )
X ( type: esriFieldTypeDouble, alias: X )
Y ( type: esriFieldTypeDouble, alias: Y )
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created_date ( type: esriFieldTypeDate, alias: created_date, length: 8 )
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