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For the 2022 HD layer, boundaries were updated to align with 2020 Census Tract boundary changes within their corresponding 2022 SPAs with consideration for maintaining effective service delivery. The HDs were refined to conform with the County boundary and coastline from the 2021 Supervisorial Districts and County Boundary layers.Data Fields:HD (Type = Text, Length = 2, Alias = HD 2022): Health District number as text; a numeric but non-quantitative identifierHD_NAME (Type = Text, Length = 30, Alias = HD NAME): Full Health District nameSPA (Type = Text, Length = 1, Alias = SPA 2022): SPA number that HD resides withinSPA_NAME (Type = Text, Length = 30, Alias SPA NAME): Full SPA name that HD resides withinHD_NUM (Type = Short, Alias HD NUM): Health District number as number; field type from earlier 2012 version of HDsUpdate Frequency: After every Decennial Census or as needed", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 102645, "latestWkid": 2229, "xyTolerance": 0.003280833333333333, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -117608900, "falseY": -91881400, "xyUnits": 3048.0060960121928, "falseZ": 0, "zUnits": 1, "falseM": 0, "mUnits": 1 }, "copyrightText": "This data is maintained by the Los Angeles County Department of Public Health. 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