spot_landsat_merge2.shp

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Dr. Sam Batzli
Publication_Date: October 23, 2008
Publication_Time: 5pm
Title: spot_landsat_merge2.shp
Edition: 2
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage:
<ftp://ftp.ssec.wisc.edu/pub/wisconsinview/floods/2008_June/shapefiles/spot_landsat_merge2.zip>
Description:
Abstract:
This shapefile represents combined processing output from optical sensors on 4 different satellites (Landsat -5, SPOT-2, SPOT-4, SPOT-5) for a total of 25 multispectral images of Wisconsin during and after the June flooding event of 2008. Imagery dates range from June 14 to July 4, 2008. In the version of the data, ALL WATER IS REPRESENTED including lakes and rivers. If this file is placed under the DNR 24K Hydro layer and colored differently (red for example, with the Hydro layer is colored blue) areas that are not obscured with represent estimated flooding.
This file has NOT been combined with the current Radarsat 6/15-16/2008 shapefile.
This is a final product that includes known errors of comission (features identified as water that are not water -- usually cloud shadows or wet soil) errors of omission (water not identified -- usually because of tree canopy, clouds, or spectral confusion with heavy silt loads). There are geometric errors too where the original satellite imagery did not align properly with the DNR 24k Hydro layer (v6). I made a significant effort to correct these but in some cases (particularly the Sheboygan SPOT-4 image and the Wild Rose and Portage SPOT-2 images) it was not completely resolved.
Purpose:
This data is intended to help with recovery efforts of Wisconsin Emergency Management and other State, Federal, and County government entities. Because of its complexity (multiple sensors, layered polygons, multiple dates), it should be used with caution. It should be used to identify general areas of concern for further study or ground survey, not as a definitive result. As subsets of this product are compared with field studies and additional "ground truth" data (such as 2008 1-meter NAIP available from <http://www.wisconsinview.org>), higher quality products will result. Taken as, this is a "best guess" product and should be treated as such.
Supplemental_Information:
Image processing by Dr. Sam Batzli of WisconsinView, SSEC, UW-Madison, data acquisition made possible through activation of the International Charter (Call #208) by Wisconsin Emergency Management and the US Geological Survey.
See PDF report included in Zip bundle for details on processing technique and ground truthing. Here are the general steps used:
Data Prep: 1) Identify potentially useful images (rejecting cloudy images and misnamed tiles). 2) Identify scene location (using provided shapefile - incomplete). 3) Download and unzip images to local drive. 4) Evaluate spatial integrity (three SPOT images poorly geo-corrected).
Data Analysis: 5) Run unsupervised classification (30-60 classes - more if haze or clouds were present, 10 iterations, .95-.99 convergence). 6) Open resulting new image in ArcGIS 9.3 - ArcMap. 7) Visually inspect raster output overlaid on original imagery for water classes (usually 4-8 classes). 8) Re-classification with ArcMap Spatial Analyst to produce an image with three classes (water, land, no-data). 9) Run a "raster to feature" process with ArcMap Spatial Analyst to generate polygon shapefile, and export the water polygons to a final shapefile. 10) Overlay shapefile on original image to identify and remove obvious errors of commission such as cloud shadows and edge effects. Re-process with more classes, iterations and/or higher convergence, if necessary. 11) Modify attribute table to indicate polygon source and size: platform, sensor, resolution, date, area (meters). 12) Merge adjacent polygon fragments to simplify shapefile. 13) Mosaic shapefiles from all 28 scenes to produce single "all-water" shapefile.
Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: June-July 2008
Time_of_Day: n/a
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -91.728235
East_Bounding_Coordinate: -87.516525
North_Bounding_Coordinate: 44.516156
South_Bounding_Coordinate: 42.474008
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: flood
Theme_Keyword: floods
Theme_Keyword: flooding
Theme_Keyword: Wisconsin Emergency Management
Theme_Keyword: WisconsinView
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Wisconsin
Temporal:
Temporal_Keyword_Thesaurus: none
Temporal_Keyword: 2008
Temporal_Keyword: June
Access_Constraints: This is public domain data.
Use_Constraints: None. See "abstract" and "purpose" for limits on accuracy
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Dr. Sam Batzli
Contact_Organization: WisconsinView, Space Science & Engineering Center, UW-Madison
Contact_Position: Assistant Scientist
Contact_Address:
Address_Type: mailing address
Address: 1225 W Dayton St
City: Madison
State_or_Province: WI
Postal_Code: 53706
Country: USA
Contact_Voice_Telephone: 608-263-3126
Contact_TDD/TTY_Telephone: none
Contact_Facsimile_Telephone: 608-262-5974
Contact_Electronic_Mail_Address: sabatzli@wisc.edu
Contact_Instructions: Try e-mail first.
Browse_Graphic:
Browse_Graphic_File_Name:
<ftp://ftp.ssec.wisc.edu/pub/wisconsinview/floods/2008_June/shapefiles/spot_landsat_merge2_browse.jpg>
Browse_Graphic_File_Description: Browse graphic from ArcCatalog screen-shot.
Browse_Graphic_File_Type: JPEG
Data_Set_Credit:
Image processing by Dr. Sam Batzli of WisconsinView, SSEC, UW-Madison, data acquisition made possible through activation of the International Charter (Call #208) by Wisconsin Emergency Management and the US Geological Survey.
Security_Information:
Security_Classification_System: none
Security_Classification: none
Security_Handling_Description: none
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.0.1770
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 233529
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Transverse Mercator
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -90.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 520000.000000
False_Northing: -4480000.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000000
Ordinate_Resolution: 0.000000
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: D_North_American_1983_HARN
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: spot_landsat_merge2
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: ID
Attribute_Definition: Polygon number from merge efforts.
Attribute_Definition_Source: Batzli
Attribute:
Attribute_Label: GRIDCODE
Attribute_Definition:
Used when raster converted to vector as a way to differentiate land from water. Only water is included in this shapefile.
Attribute_Definition_Source: Batzli
Attribute:
Attribute_Label: area_m
Attribute_Definition: Polygon area calculated in square meters in ArcMap.
Attribute_Definition_Source: Batzli
Attribute:
Attribute_Label: sensor
Attribute_Definition:
Satellite sensor used to identify water spectra that resulted in this polygon.
Attribute_Definition_Source: Batzli
Attribute:
Attribute_Label: platform
Attribute_Definition: Name of satellite source for this polygon.
Attribute_Definition_Source: Batzli
Attribute:
Attribute_Label: image_date
Attribute_Definition: Ground date of satellite image acquisition for this polygon.
Attribute_Definition_Source: Batzli
Attribute:
Attribute_Label: resolution
Attribute_Definition: Spatial resolution of original pixels used to create polygon.
Attribute_Definition_Source: Batzli
Distribution_Information:
Resource_Description: Downloadable Data. Visit <http://www.wisconsinview.org>
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 38.794
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<ftp://ftp.ssec.wisc.edu/pub/wisconsinview/floods/2008_June/shapefiles/spot_landsat_merge2.zip>
Metadata_Reference_Information:
Metadata_Date: 20081023
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Dr. Sam Batzli
Contact_Organization: WisconsinView, Space Science & Engineering Center, UW-Madison
Contact_Position: Assistant Scientist
Contact_Address:
Address_Type:
REQUIRED: The mailing and/or physical address for the organization or individual.
City: REQUIRED: The city of the address.
State_or_Province: REQUIRED: The state or province of the address.
Postal_Code: REQUIRED: The ZIP or other postal code of the address.
Contact_Voice_Telephone: 608-263-3126
Contact_TDD/TTY_Telephone: none
Contact_Facsimile_Telephone: 608-262-5974
Contact_Electronic_Mail_Address: sabatzli@wisc.edu
Contact_Instructions: Try e-mail first.
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.6 on Thu Oct 23 21:12:26 2008