PublicGIS_DB.AC.ASR_Parcel_EGIS

Frequently anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   Assessor, Alameda County , PublicGIS_DB.AC.ASR_Parcel_EGIS.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -122.374431

   East_Bounding_Coordinate: -121.468934

   North_Bounding_Coordinate: 37.915926

   South_Bounding_Coordinate: 37.448143

3. What does it look like?

4. Does the data set describe conditions during a particular time period?

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: vector digital data

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • GT-polygon composed of chains (405028)

   2. What coordinate system is used to represent geographic features?

      The map projection used is Lambert Conformal Conic.

      Projection parameters:

      Standard_Parallel: 37.06666666666667

      Standard_Parallel: 38.43333333333333

      Longitude_of_Central_Meridian: -120.5

      Latitude_of_Projection_Origin: 36.5

      False_Easting: 6561666.666666666

      False_Northing: 1640416.666666667

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.00012689905650014872
      Ordinates (y-coordinates) are specified to the nearest 0.00012689905650014872
      

      The horizontal datum used is D North American 1983.
      The ellipsoid used is GRS 1980.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257222101.
      

7. How does the data set describe geographic features?

   PublicGIS_DB.AC.ASR_Parcel_EGIS

   OBJECTID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   APN

   APN_SORT

   BOOK

   PAGE

   PARCEL

   SUB_PARCEL

   CLCA_CATEGORY

   COMMENTS

   DATE_CREATE

   DATE_UPDATE

   EDITOR

   FID_PARCELS

   SHAPE

   Feature geometry. (Source: ESRI)

   Coordinates defining the features.

   CENTROID_X

   CENTROID_Y

   SHAPE.STArea()

   SHAPE.STLength()

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Alameda County Assessor

2. Who also contributed to the data set?

3. To whom should users address questions about the data?
   Alameda County Assessor
   Attn: Leland Leong
   Information Systems Manager
   Oakland, CA 94612
   US
   

   510-272-6353 (voice)
   510-272-3803 (FAX)
   

Why was the data set created?

Mapping and spacial analysis. Resource management and development planning.

How was the data set created?

1. From what previous works were the data drawn?

2. How were the data generated, processed, and modified?

3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

H