Historical Land Cover, LOBP eastern sites (Sandy Pond), 1938

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Identification_Information

Citation:
Citation_Information:
Originator: Lake Ontario Biocomplexity Project
Publication_Date: 2008
Title: Historical Land Cover, LOBP eastern sites (Sandy Pond), 1938
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Cornell University, Ithaca N.Y.
Publisher: Lake Ontario Biocomplexity Project
Online_Linkage: https://cugir.library.cornell.edu/catalog/cugir-007939
Description:
Abstract: This shapefile contains polygons representing the historical land cover within the watersheds near Sandy Pond, in New York, on the eastern shore of Lake Ontario. These land cover boundaries and types were interpreted from aerial photos dating from 1938.
Purpose: To evaluate broad changes in land cover over time.
Supplemental_Information: This dataset was developed as part of the Lake Ontario Biocomplexity Project. For more information, see: <http://ontario.cfe.cornell.edu/>
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1938
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -76.208097
East_Bounding_Coordinate: -75.66526
North_Bounding_Coordinate: 43.980103
South_Bounding_Coordinate: 43.609502
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Land Cover
Theme_Keyword: Land Use
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: environment
Theme_Keyword: planningCadastre
Theme:
Theme_Keyword_Thesaurus: CUGIR Category
Theme_Keyword: landcover
Theme_Keyword: environment
Theme_Keyword: property
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: New York
Place_Keyword: Lake Ontario
Place_Keyword: Sandy Pond
Place:
Place_Keyword_Thesaurus: LCSH
Place_Keyword: New York (State)
Place_Keyword: Ontario, Lake (N.Y. and Ont.)
Access_Constraints: None
Use_Constraints: None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Marci Meixler
Contact_Organization: Cornell University
Contact_Address:
Address_Type: mailing
Address: 104 Rice Hall
Address: Department of Natural Resources
Address: Cornell University
City: Ithaca
State_or_Province: NY
Postal_Code: 14853
Country: U.S.A.
Contact_Voice_Telephone: (607) 255-2038
Contact_Facsimile_Telephone: (607)255-1895
Contact_Electronic_Mail_Address: msm10@cornell.edu
Browse_Graphic:
Browse_Graphic_File_Name: https://cugir-data.s3.amazonaws.com/00/79/39/preview.png
Browse_Graphic_File_Description: preview of the dataset
Browse_Graphic_File_Type: PNG

Data_Quality_Information

Logical_Consistency_Report: Unknown
Completeness_Report: The maps for the historical time periods (1938, 1955, and 1975) are not spatially complete. In all cases the shoreline is most complete but watershed coverage is spotty. North and South Sandy Pond watersheds and South Colwell watershed are represented in part or in full for some years. Floodwood watershed is not represented in any of the historical years. This is because Floodwood and South Colwell are in Jefferson and Lewis Counties. We were unable to locate any historical photos for these counties from any federal, state, or local agency. Private firms were also dead ends for locating historical photos and the NY Office of Real Property Services who purported to have some historical coverage would not allow our project to use their photos. Oswego County had good coverage though in some years even it was not continuous and hence the sometimes incomplete maps for N and S Sandy Ponds. For the purposes of historical analysis for the Biocomplexity project the shorelines and some of the subwatersheds (for which we do stream sampling) can by viewed in their entirety.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: It is important to note that the aerial photos used for this project differed in resolution, scale, and distortion. Therefore the level of detail within each of the landcover maps varies. Additionally, due to this distortion the resulting maps do not align perfectly at boundaries such as shorelines and embayments and even fixed objects. The project group took as much care as possible to get good registration, and achieved the best possible without advanced triangulation and other interpretation techniques that were beyond the scope of this project. Users of these maps should be aware of these limitations and use them as general depictions of the land use and land cover and use them to only evaluate broad changes over time.
Lineage:
Process_Step:
Process_Description: Files were created by aligning historical aerial photographs along flight lines and tracing landcover classes onto clear acetate overlays. The polygons on the overlays were then digitized into ArcView GIS in Sibley Hall at Cornell during the Summer of 2003 by our REU intern, Seth Lozano. Interpretation of the aerial photos was done by Seth, Andrea Parmenter, and the rest of the summer field interns. All photos for the project were provided by the Oswego County Soil and Water Conservation District in Fulton, NY. (One exception to the above protocol was for the 1995 land cover. For this time period the Digital Orthophoto Quarter Quadrangles in near infrared were printed at a scale of 1:24,000 and the acetate laid on top of them. These DOQQ's are available for free online from the NY State GIS server and are considerably more detailed than any other photos used in the study. They are also more spatially accurate in terms of georeferencing. Therefore, we believe this map to be the most accurate of any in the eight watersheds. It is also the only spatially complete map in the eastern study sites containing the Floodwood watershed. The DOQQ photos exist in UTM, Zone 18, NAD83. We digitized the overlays from the DOQQ's by registering them to tics in this same Datum. The final map was then projected to UTM, Zone 18, Datum NAD27 to match the others in the study.) Registration of the acetate overlays to real world coordinates was accomplished by using a series of tic marks (e.g. road intersections for which we knew the coordinates and could locate on the photos). In all cases care was taken to minimize the root mean square (RMS) error, and hence distortion caused by registration. The RMS values and tic IDs used for each map can be found in the red airphoto documentation notebook in 306 Rice Hall.
Process_Date: 2003
Process_Step:
Process_Description: CUGIR staff defined the dataset projection as UTM18N (meters, NAD27), removed extraneous attributes, and exported the data as a shapefile.
Process_Date: 20080122

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: 480

Spatial_Reference_Information

Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000256
Ordinate_Resolution: 0.000256
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.400000
Denominator_of_Flattening_Ratio: 294.978698

Entity_and_Attribute_Information

Entity_Type:
Entity_Type_Label: Polygon
Entity_Type_Definition: Polygon representing the predominant land cover
Entity_Type_Definition_Source: Lake Ontario Biocomplexity Project
Attributes:
Name Description Values
AREA area of polygon, in square meters 0 to Unbounded
PERIMETER perimeter of polygon, in meters 0 to Unbounded
COVER Value representing the predominant land cover classification coded values

Distribution_Information

Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Albert R. Mann Library
Contact_Address:
Address_Type: mailing and physical
Address: Cornell University
City: Ithaca
State_or_Province: New York
Postal_Code: 14853
Contact_Voice_Telephone: 607-255-5406
Contact_Electronic_Mail_Address: mann-ref@cornell.edu
Distribution_Liability: Cornell University provides these geographic data "as is". Cornell University makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. Cornell University further makes no warranty either expressed or implied, regarding the condition of the product or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these files have been processed successfully on computers at Cornell University, no warranty is made by Cornell University regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Shapefile
Format_Information_Content: zipped shapefile
File_Decompression_Technique: zip
Transfer_Size: 0.30
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Digital_Form:
Digital_Transfer_Information:
Format_Name: metadata
Format_Information_Content: FGDC XML metadata
Digital_Transfer_Option:
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Digital_Form:
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Format_Name: HTML metadata
Format_Information_Content: FGDC HTML metadata
Digital_Transfer_Option:
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Digital_Form:
Digital_Transfer_Information:
Format_Name: KML
Format_Information_Content: generated KML, via WFS
Digital_Transfer_Option:
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Digital_Form:
Digital_Transfer_Information:
Format_Name: GeoJSON
Format_Information_Content: generated GeoJSON, via WFS
Digital_Transfer_Option:
Online_Option:
Digital_Form:
Digital_Transfer_Information:
Format_Name: OGC:WMS
Format_Information_Content: WMS, from GeoServer
Digital_Transfer_Option:
Online_Option:
Fees: None

Metadata_Reference_Information

Metadata_Date: 20190524
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Albert R. Mann Library
Contact_Address:
Address_Type: mailing and physical
Address: Albert R. Mann Library
City: Ithaca
State_or_Province: New York
Postal_Code: 14853
Country: USA
Contact_Voice_Telephone: 607-255-5406
Contact_Electronic_Mail_Address: mann-ref@cornell.edu
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time