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The CIO and the LA County Enterprise GIS group worked with the Los Angeles County Board of Supervisors Unincorporated Area and Field Deputies to establish names that reflect as best as possible the general name preferences of residents and historical names of areas. A Board Motion will establish these area names as \u201cBoard Approved.\u201d CSAs differ from the more informal \u201cCommunity\u201d geographies because:They are primarily focused on broad statistics and reporting, not mapping of communities.They represent board approved geographies comprised of Census block groups split by cities.They must cover the entire unincorporated CountyThere can be no holes or overlapping areasThe CSAs were created using Census Block Groups split by cities (e.g. \"Split Block Groups\") as a geographic building block. This allows users to leverage the rich information provided by the US Census Bureau to better report statistics, including rates from the decennial census and population estimates. Population estimates are included in the POPULATION field. These values represent the most recently available population estimate information for the year 2016.In the City of Los Angeles, the LA City Neighborhood file was overlaid on the Block Groups and boundaries assigned using the centroid of the block group - therefore, while the names of the CSAs in LA City match the neighborhood file, the boundaries are not the same.Additionally, CSAs are to be named according to the following recommended naming conventions:All names will be assumed to begin with \u201cUnincorporated\u201d (e.g. Unincorporated El Camino Village). They will not be part of the Statistical Geography Name (so the name of the Statistical Area would be \u201cEl Camino Village\u201d).Names will not contain \u201cIsland\u201d \u2013 beginning each name with \u201cUnincorporated\u201d will distinguish an area from any surrounding cities. 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In cities, a census block may correspond to a city block, but in rural areas where there are fewer roads, blocks may be limited by other features.ImportantThe Census Bureau mistakenly merged Census Tract 1370.00 into Tract 8002.04 in the 2010 census, and released block level data tables with that mistake. This mistake was corrected in 2011, however the data tables (SF1, etc) were not updated to reflect this change. For this file, the CT10 field and the CTCB10 fields reflect the original 2010 data, and include that mistake.In 2012, the Census Bureau further complicated matters by merging Tract 9304.01 into Tract 1370.00. 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"shapeAreaFieldName": "Shape.STArea()", "shapeLengthFieldName": "Shape.STLength()", "units": "esriFeet" }, "hasMetadata": false, "isDataArchived": false, "archivingInfo": { "supportsQueryWithHistoricMoment": false, "startArchivingMoment": -1 }, "supportsCoordinatesQuantization": true, "supportsDynamicLegends": true }, { "currentVersion": 10.91, "cimVersion": "2.9.0", "id": 3, "name": "City Symbol", "type": "Feature Layer", "description": "This layer represents current city boundaries within Los Angeles County. The Los Angeles County Department of Public Works provides the most current shapefiles representing city boundariesand city annexationson the Los Angeles County GIS Data Portal. True, legal boundaries are only determined on the ground by surveyors licensed in the State of California. Numerous records are freely available at the Land Records Informaitonwebsite, hosted by the Department of Public Works.Principal attributes include:CITY_NAME: represents the city's name.CITY_TYPE: may be used for definition queries; \"Unincorporated\" or \"City\".FEAT_TYPE: identifies the feature that each polygon represents:Land - This value is used for polygons representing the land masses, if you want to see only land features on your map.Pier - This value is used for polygons representing piers along the coastline. One example is the Santa Monica Pier.Breakwater - This value is used for polygons representing man-made barriers that protect the harbors.Water - This value is used for polygons representing navigable waters inside the harbors and marinas.3NM Buffer - This value is used for polygons representing the three seaward nautical miles within the cities' limits, per the Submerged Lands Act.POPULATION: Information in this field is supplied by Mark Greninger (mgreninger@cio.lacounty.gov).Reference Date: 2013", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 102645, "latestWkid": 2229, "xyTolerance": 0.00169648078169039, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -1.17608899999593E8, "falseY": -9.18813999997623E7, "xyUnits": 4715.6443423006, "falseZ": 0, "zUnits": 1, "falseM": 0, "mUnits": 1 }, "copyrightText": "This data is maintained by the Los Angeles County Department of Public Works. Contacts: Thierno Diallo, 626-458-6920, tdiallo@dpw.lacounty.gov , Michael Maung, 626-458-7078, mmaung@dpw.lacounty.gov", "parentLayer": null, "subLayers": [], "minScale": 0, "maxScale": 0, "referenceScale": 0.0, "drawingInfo": { "renderer": { "type": "uniqueValue", "field1": "COLOR_CODE", "uniqueValueInfos": [ { "symbol": { "type": "esriSFS", "style": "esriSFSSolid", "color": [ 255, 255, 199, 255 ], "outline": { "type": "esriSLS", "style": "esriSLSSolid", "color": [ 0, 0, 0, 255 ], "width": 1 } }, "value": "1", "label": "Unincorporated Areas" }, { "symbol": { "type": "esriSFS", "style": "esriSFSSolid", "color": [ 212, 133, 133, 255 ], "outline": { "type": "esriSLS", "style": "esriSLSSolid", "color": [ 0, 0, 0, 255 ], "width": 1.2 } }, "value": "2", "label": "Incorporated Cities" }, { "symbol": { "type": "esriSFS", "style": "esriSFSSolid", "color": [ 168, 110, 196, 255 ], "outline": { "type": "esriSLS", "style": "esriSLSSolid", "color": [ 0, 0, 0, 255 ], "width": 1.2 } }, "value": "3", 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