Description: Historic Resources of Marin County were digitized from a list of known historic locations provided by the State Office of Historic Resources.
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Description: Clear zone, Approach zone, Traffic zone, and Overflight zone from Figure3.1: Safety Zones in the 1991 Marin County Airport Land Use Plan for Gnoss Field. Marin County Community Development Agency staff digitized the aviation safety zones in February 2024.
Copyright Text: Cortright & Siebold, Airport Consulting/Engineering/Planning. Digitized by Marin County Community Development Agency.
Value: Clear Zone, Primary Surface, and Approach Area to 1,000' out Label: Clear Zone, Primary Surface, and Approach Area to 1,000' out Description: Symbol:
Description: 55, 60, and 65 dB CNEL noise contours based on flight tracks for Gnoss Field from Figure 3.2: Flight Tracks/Noise Contours in the 1991 Marin County Airport Land Use Plan for Gnoss Field. Marin County Community Development Agency staff digitized the noise contours in February 2024.
Copyright Text: Cortright & Siebold, Airport Consulting/Engineering/Planning. Digitized by Marin County Community Development Agency.
Description: Referral area boundary from Figure3.1: Safety Zones in the 1991 Marin County Airport Land Use Plan for Gnoss Field. Marin County Community Development Agency staff digitized the referral area boundary in February 2024.
Copyright Text: Cortright & Siebold, Airport Consulting/Engineering/Planning. Digitized by Marin County Community Development Agency.
Description: Mineral Resource Preservation Sites created through parcel numbers provided by the California State Department of Conservation Division of Mines and Geology and Marin County Department of Public Works. Four local sites were added to State list.
Copyright Text: California State Department of Conservation Division of Mines and Geology
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Label Placement: esriServerPolygonPlacementAlwaysHorizontal Label Expression: "Club List = " CONCAT [ClubList] Use Coded Values: true Symbol:
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Description: This feature class has been derived from a 1-meter gridded topographic-bathymetric terrain model that was resampled from the MarinMap "tbsm45cm_201008" surface.Resampling was performed using ERDAS Imagine. The surface gradient, expressed as percentage slope, was calculated using ESRI ArcGIS Spatial Analyst functions.ESRI Spatial Analyst Surface functions were used to define contour line features at 15-percent, 26-percent, and 36-percent over the seamless 1-meter countywide slope grid.Considerable effort was expended to build these contours into polygon areas that identify the four slope classes that are discriminated by those three contours.The complexity and the extreme variation in length of the contours made it necessary to dice the segments with a 200-meter grid to shorten the boundaries around the resulting polygons.Once a clean polygon build was successful countywide, centroid points were generated for each polygon and used to interpolate the percent slope grid under each point.These points were then reclassified into the CDA-defined categories, and a coded-value domain was defined for the classification as follows:0 - slope less than 15 percent1 - slope from 15--25 percent2 - slope from 26--35 percent3 - slope 36 percent and greaterThe label points with coded-value attributes were used with the clean bounding lines to generate the final set of countywide slope contours.The development work was performed in US National Grid (WGS 1984 UTM zone 10 north meters) and exported to an ESRI Feature Dataset to project this version to MarinMap customary system (NAD 1983 HARN California Coordinates zone 3 US Survey feet)
Copyright Text: County of Marin, Community Development Agency, GIS Division
Brian B. Quinn Ph.D. GISP
bquinn@marincounty.org
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Description: The Anadromous Fish Zone is a policy area calling for the protection of steelhead, coho, chinook fish species. Policies described in the 2007 Marin Countywide Plan (CWP) for the Stream Conservation Area (SCA) are applicable. For details refer to 2007 CWP Program Goal-4 on Reparian Conservation but specifially Goal Bio-4a Adopt Expanded SCA Ordinance. Anadromous fish-bearing stream reaches may be initially identified from topographic maps by considering the limit of anadromy up to a sustained channel slope of eight to ten percent. Resident trout reaches are defined as channels with gradients up to 20 percent (Robison et al. 2000, SSHEAR 1998). DFG biologists or land managers may have knowledge of anadromy limits due to local features such as falls, debris jams, small dams, or other stream crossings that may act as migration barriers. From: CA Department of Fish and Game habitat restoration manual, April 2003, Chapter IX-Fish Passage Evaluation at Stream Crossings The zone is a setback (buffer) from the bank of streams, spatially discribed in CWP pages 2-31/32. For stream data we use the Stream FC from County of Marin DPW {querying features "[combo]>0" where 0 means no protection is required, greater than 0 means one or more of the three fish need protection}. There are two groups of setbacks: 1) a combination of 40, 70, 120ft from stream center line (compensating for CWP specified 20', 50', 100' resp. setbacks from bank) in the City Center Corridor (CCC) 2) 120ft buffer from stream center line (compensating for 100' from bank) of streams in Marin for the Coastal, Inland Rural and Baylands Corridors.
Description: The Anadromous Fish Zone is a policy area calling for the protection of steelhead, coho, chinook fish species. Policies described in the 2007 Marin Countywide Plan (CWP) for the Stream Conservation Area (SCA) are applicable. For details refer to 2007 CWP Program Goal-4 on Reparian Conservation but specifially Goal Bio-4a Adopt Expanded SCA Ordinance. Anadromous fish-bearing stream reaches may be initially identified from topographic maps by considering the limit of anadromy up to a sustained channel slope of eight to ten percent. Resident trout reaches are defined as channels with gradients up to 20 percent (Robison et al. 2000, SSHEAR 1998). DFG biologists or land managers may have knowledge of anadromy limits due to local features such as falls, debris jams, small dams, or other stream crossings that may act as migration barriers. From: CA Department of Fish and Game habitat restoration manual, April 2003, Chapter IX-Fish Passage Evaluation at Stream Crossings The zone is a setback (buffer) from the bank of streams, spatially discribed in CWP pages 2-31/32. For stream data we use the Stream FC from County of Marin DPW {querying features "[combo]>0" where 0 means no protection is required, greater than 0 means one or more of the three fish need protection}. There are two groups of setbacks: 1) a combination of 40, 70, 120ft from stream center line (compensating for CWP specified 20', 50', 100' resp. setbacks from bank) in the City Center Corridor (CCC) 2) 120ft buffer from stream center line (compensating for 100' from bank) of streams in Marin for the Coastal, Inland Rural and Baylands Corridors.
Description: The Anadromous Fish Zone is a policy area calling for the protection of steelhead, coho, chinook fish species. Policies described in the 2007 Marin Countywide Plan (CWP) for the Stream Conservation Area (SCA) are applicable. For details refer to 2007 CWP Program Goal-4 on Reparian Conservation but specifially Goal Bio-4a Adopt Expanded SCA Ordinance. Anadromous fish-bearing stream reaches may be initially identified from topographic maps by considering the limit of anadromy up to a sustained channel slope of eight to ten percent. Resident trout reaches are defined as channels with gradients up to 20 percent (Robison et al. 2000, SSHEAR 1998). DFG biologists or land managers may have knowledge of anadromy limits due to local features such as falls, debris jams, small dams, or other stream crossings that may act as migration barriers. From: CA Department of Fish and Game habitat restoration manual, April 2003, Chapter IX-Fish Passage Evaluation at Stream Crossings The zone is a setback (buffer) from the bank of streams, spatially discribed in CWP pages 2-31/32. For stream data we use the Stream FC from County of Marin DPW {querying features "[combo]>0" where 0 means no protection is required, greater than 0 means one or more of the three fish need protection}. There are two groups of setbacks: 1) a combination of 40, 70, 120ft from stream center line (compensating for CWP specified 20', 50', 100' resp. setbacks from bank) in the City Center Corridor (CCC) 2) 120ft buffer from stream center line (compensating for 100' from bank) of streams in Marin for the Coastal, Inland Rural and Baylands Corridors.
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Description: The Stream Conservation Area (SCA) is described in the 2007 Marin Countywide Plan (CWP) under the Program Goal Bio-4. The SCA is a zone within a setback (buffer) from banks of streams, spatially described in the 2007 CWP pages 2-31/32. For streams we use the NHDFlowline feature class (from the Federal National Hydrography Dataset (NHD)): FType of Connector, CanalDitch, StreamRiver, ArificialPath {querying features "[FType] IN (334, 336, 460, 558)"} ). There are two groups of setbacks: 1) a combination of 40, 70, 120ft from stream center line (compensating for CWP specified 20', 50', 100' resp. setbacks from bank) in the City Center Corridor (CCC) 2) 120ft buffer from stream center line (compensating for 100' from bank) of streams in Marin for the Coastal, Inland Rural and Baylands Corridors.
Description: The Stream Conservation Area (SCA) is described in the 2007 Marin Countywide Plan (CWP) under the Program Goal Bio-4. The SCA is a zone within a setback (buffer) from banks of streams, spatially described in the 2007 CWP pages 2-31/32. For streams we use the NHDFlowline feature class (from the Federal National Hydrography Dataset (NHD)): FType of Connector, CanalDitch, StreamRiver, ArificialPath {querying features "[FType] IN (334, 336, 460, 558)"} ). There are two groups of setbacks: 1) a combination of 40, 70, 120ft from stream center line (compensating for CWP specified 20', 50', 100' resp. setbacks from bank) in the City Center Corridor (CCC) 2) 120ft buffer from stream center line (compensating for 100' from bank) of streams in Marin for the Coastal, Inland Rural and Baylands Corridors.
Description: The Stream Conservation Area (SCA) is described in the 2007 Marin Countywide Plan (CWP) under the Program Goal Bio-4. The SCA is a zone within a setback (buffer) from banks of streams, spatially described in the 2007 CWP pages 2-31/32. For streams we use the NHDFlowline feature class (from the Federal National Hydrography Dataset (NHD)): FType of Connector, CanalDitch, StreamRiver, ArificialPath {querying features "[FType] IN (334, 336, 460, 558)"} ). There are two groups of setbacks: 1) a combination of 40, 70, 120ft from stream center line (compensating for CWP specified 20', 50', 100' resp. setbacks from bank) in the City Center Corridor (CCC) 2) 120ft buffer from stream center line (compensating for 100' from bank) of streams in Marin for the Coastal, Inland Rural and Baylands Corridors.
Label Placement: esriServerLinePlacementAboveAlong Label Expression: "Coastal Zone Boundary" Use Coded Values: true Symbol:
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Description: In the Marin County Local Coastal Plan document, several communities had zoning maps prepared that were annotated with a line labeled "Community Expansion Boundary". These features were digitized from scans of map copies from the Local Coastal Plan that were georeferenced using parcel and / or road features. Polygons were constructed from the digitized bounding lines.
Copyright Text: County of Marin, Local Coastal Program, Unit II
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