SL_Ortho-Mosaic_1067_102403_1200-10x.sid

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?
• 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?

Title: SL_Ortho-Mosaic_1067_102403_1200-10x.sid

Abstract:

Sherman Lake mosaiced aerial photographs (from 5 photos), ortho-rectified. 1200dpi, compressed 10x using MrSID software. 0.2 meter (0.67ft) pixel resolution

1. How should this data set be cited?

   Hammon, Jensen & Wallen; Wetlands & Water Reso, Nov. 2003, SL_Ortho-Mosaic_1067_102403_1200-10x.sid: IRWM Pilot Project, funded by CBDA Science Program 1067, WWR, San Rafael, CA.

   Online Links:

   • <http://www.irwm.org>

   Other_Citation_Details:

   See <http://www.swampthing.org> or <http://www.irwm.org> for addtional information

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: 606133.113

   East_Bounding_Coordinate: 601721.113

   North_Bounding_Coordinate: 4213729.035

   South_Bounding_Coordinate: 4210257.435

3. What does it look like?

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

   Calendar_Date: Oct. 24, 2003

   Currentness_Reference: ground condition

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

   Geospatial_Data_Presentation_Form: remote-sensing/color infrared aerial photo image

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

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

      • G-polygon (94)
      • Point (4)
      • GT-polygon composed of chains (1)
      • Point (4)
      It contains the following raster data types:
      • Dimensions 17358 x 22060 x 1, type Pixel

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

      Planar coordinates are encoded using row and column
      Abscissae (x-coordinates) are specified to the nearest 0.200000
      Ordinates (y-coordinates) are specified to the nearest 0.200000
      

      The horizontal datum used is NAD83.
      The ellipsoid used is Geodetic Reference System 80.
      

      Vertical_Coordinate_System_Definition:

      Altitude_System_Definition:

7. How does the data set describe geographic features?

   Band_1

   ObjectID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Value

   Whole numbers that are automatically generated.

   Count

   Whole numbers that are automatically generated.

   Positive real numbers that are automatically generated.

   Sequential unique whole numbers that are automatically generated.

   Band_2

   ObjectID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Value

   Count

   Band_3

   ObjectID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Value

   Count

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Hammon, Jensen & Wallen; Wetlands & Water Resources (Stuart Siegel, Jake Schweitzer). IRWM Pilot Project funded by CBDA Science Program

2. Who also contributed to the data set?

   Produced by HJW, rectified and mosaiced by Jake Schweitzer, WWR for IRWM Pilot Project (funded by CA Bay Delta Authority [CBDA])

3. To whom should users address questions about the data?

   Wetlands & Water Resources
   c/o Stuart W. Siegel
   President
   1010 B St, Suite 425
   San Rafael, CA 94901
   USA
   

   (415) 457-0250 (voice)
   (415) 457-0260 (FAX)
   [email protected]
   

   Hours_of_Service: 9am-5pm

   Contact_Instructions:

   www.wetlands-and-water-resources.com or www.swampthing.org

Analyses for IRWM Pilot Project

1. From what previous works were the data drawn?

   (source 1 of 1)

   HJW, Oct 24, 2003, HJW:,.

   Online Links:

   • <http://www.hjw.com>

   Type_of_Source_Media: Color Infrared Digital Aerial Photo

   Source_Scale_Denominator: 9,600 (photo scale)

   Source_Contribution: HJW, Jake Schweitzer (WWR)

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

   Date: Nov 2003 (process 1 of 6)

   Photos scanned at 1,200 DPI Ortho-rectified using GPS ground control target points Mosaiced from 5 individual photos using MrSID Compressed x10 using MrSID

   Person who carried out this activity:
   

   Jake Schweitzer
   WWR
   GIS Specialist
   1010 B St., Suite 425
   San Rafael, CA 94901
   USA
   

   (415) 457-0250 (voice)
   [email protected]
   

   Contact_Instructions: For information on original data, contact Peter Ashley, HJW

   (process 2 of 6)

   Metadata imported.

   Data sources used in this process:

   • C:\Temp\xml1FF.tmp

   (process 3 of 6)

   Metadata imported.

   Data sources used in this process:

   • C:\Temp\xml1BD2.tmp

   (process 4 of 6)

   Metadata imported.

   Data sources used in this process:

   • C:\Temp\xml11E2.tmp

   (process 5 of 6)

   Metadata imported.

   Data sources used in this process:

   • C:\Temp\xml6A2.tmp

   (process 6 of 6)

   Metadata imported.

   Data sources used in this process:

   • C:\Temp\xml1484.tmp

1. How well have the observations been checked?

   N/A

2. How accurate are the geographic locations?

   Each corner control point is within 1-2 meters of ground control point, which was set using sub-meter GeoXT GPS unit. For more detailed information, see files in "Rectification Parameters" folder, or contact Wetlands and Water Resources.

3. How accurate are the heights or depths?

   N/A

4. Where are the gaps in the data? What is missing?

5. How consistent are the relationships among the observations, including topology?

   Complete as needed

Are there legal restrictions on access or use of the data?

Access_Constraints: Public Data

Use_Constraints:

Credit to Wetlands and Water Resources (WWR) and IRWM Pilot Project, funded by CA Bay Delta Authority (CBDA) Science Program

1. Who distributes the data set? (Distributor 1 of 1)

   San Francisco Estuary Institute
   7770 Pardee Lane, 2nd Flr
   Oakland, CA 94621
   USA
   

   (510) 746-7334 (voice)
   

   Hours_of_Service: 9am to 5pm

   Contact_Instructions:

   Visit <http://www.irwm.org> on the Internet

   For additional questions/information, visit <http://www.swampthing.org>

2. What's the catalog number I need to order this data set?

   MrSID Image

3. What legal disclaimers am I supposed to read?

   Must credit WWR and CBDA

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	MrSID Image (version 2.0) Size: 96.905
     Network links:	IRWM Pilot Project
     Media you can order:	Online Transfer Only Note: Created with Windows Software

   • Cost to order the data:
   • Special instructions:

     See information at <http://www.irwm.org>

5. What hardware or software do I need in order to use the data set?

   Photo digital images are provided at multitude of size/resolution

Dates:

Last modified: 09-Feb-2004

Metadata author:

Wetlands and Water Resources
c/o Jake H. Schweitzer
GIS Specialist
1010 B St, Suite 425
San Rafael, CA 94901
USA

(415) 457-0250 (voice)
[email protected]

Hours_of_Service: 9am - 5pm

Contact_Instructions:

www.wetlands-and-water-resources.com or www.swampthing.org

Metadata standard:

FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Metadata extensions used:

• <http://www.esri.com/metadata/esriprof80.html>