Land Cover 1973 Metadata
DATASET NAME: NALC73 Identification_Information: Citation: Citation_Information: Originator: IMADES Publication_Date: Title: Description: Upper San Pedro Study Area land cover, 1973 Abstract: Derived from 60-m classified NALC imagery. Purpose: San Pedro geodata browser web site Supplemental_Information: Data_Type: GRID Software: Arc/INFO 8.2 Operating_System: Unix Path_Name: \SPDB\Grids\nalc73 Reviews_Applied_to_Date: Lockheed Martin internal review Related_Spatial_Data_Files: All geodatasets with sp_ prefix References_Cited: Skirvin, Susan M., William G. Kepner, Stuart E. Marsh, Samuel E. Drake, John K. Maingi, Curtis M. Edmonds, Christopher J. Watts, and David R. Williams. 2003 (in press). Assessing the Accuracy of Satellite-Derived Land-Cover Classification Using Historical Aerial Photography, Digital Orthophoto Quadrangles, and Airborne Video Data. in (R.S. Lunetta and J.G. Lyon, eds.) Remote Sensing and GIS Accuracy Assessment. CRC Press,Boca Raton, FL. Notes: Additional information about the NALC project can be found at https://www.epa.gov/nerlesd1/land-sci/north-am.htm Cloud_Cover: N/A Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: Currentness_Reference: Status: Interim Progress: Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: 532962.107 East_Bounding_Coordinate: 608202.107 North_Bounding_Coordinate: 3592633.734 South_Bounding_Coordinate: 3426324.734 Keywords: Theme: Theme_Keyword_Thesaurus: Theme_Keyword: San Pedro Theme_Keyword: land cover map Theme_Keyword: watershed Theme_Keyword: Landsat Access_Constraints: Use_Constraints: Data_Provider_Information: Contact_Information: Contact_Organization_Primary: Contact_Organization: EPA NERL Las Vegas Contact_Person: Bill Kepner Contact_Address: Address_Type: Address: P.O. Box 93478 City: Las Vegas State_or_Province: Nevada Postal_Code: 89193-3478 Contact_Voice_Telephone: 702 798 2193 Contact_Email_Address: kepner.william@epamail.epa.gov Data_Processor_Information: Contact_Information: Contact_Organization_Primary: Contact_Organization: IMADES Contact_Person: Unknown Contact_Address: Address_Type: Address: City: Hermosillo State_or_Province: Sonora, Mexico Postal_Code: Contact_Voice_Telephone: Contact_Email_Address: Metadata_Reference_Information: Metadata_Date: 5/10/2003 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Soren Scott Contact_Organization: USDA-ARS-SWRC Contact_Address: Address_Type: mailing Address: 2000 E. Allen Rd. City: Tucson State_or_Province: Arizona Postal_Code: 85719-1596 Contact_Voice_Telephone: Contact_Email_Address: sscott@tucson.ars.ag.gov Metadata_Standard_Version: Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Skirvin et al., 2003 Attribute_Accuracy_Value: Attribute_Accuracy_Explanation: Logical_Consistency_Report: Not presently available Completeness_Report: Not presently available Positional_Accuracy: Horizontal_Positional_Accuracy: Not presently available Vertical_Positional_Accuracy: Not presently available Lineage: Process_Step: Process_Description: 1973 NALC 60-meter imagery was classified by IMADES (Hermosillo, Sonora, Mexico). LMES clipped the imagery to the SP boundary. Process_Date: Process_Time: SPATIAL REFERENCE INFORMATION Grid Coordinate System: UTM Horizontal Datum: NAD83 Zone: 12 Units: METERS Scale: 60-meter cell base Cell size (x,y): 60, 60 SPATIAL DATA ORGANIZATION INFORMATION Number of Columns: 1254 Number of Rows: 2772 Grid Type: 1 Number of Classes: 10 Minimum Value: 1 Maximum Value: 10
LAND COVER CLASS DESCRIPTIONS FOR THE UPPER SAN PEDRO WATERSHED.
Forest
1 |
Vegetative communities comprised principally of trees potentially over 10m in height and typically characterized by closed or multi-layered canopies. Species in this category are evergreen (with the exception ofaspen), largely coniferous (e.g. ponderosa pine), and restricted to the upper elevations of mountains that arise off the desert floor. |
Oak Woodland
2 |
Vegetative communities dominated ( |
Mesquite Woodland
3 |
Vegetative communities dominated by leguminous trees (Prosopis spp.) whose crowns cover 15% or more of the ground often resulting in dense thickets (30-75% total cover). Historically maintained maximum development on alluvium of old dissected flood plains; now present without proximity to major watercourses. Winter deciduous and generally found at elevations below 1,200m |
Grassland
4 |
Vegetative communities dominated by perennial and annual grasses
( |
Desertscrub
5 |
Vegetative communities comprised of short shrubs with sparse
foliage ( |
Riparian
6 |
Vegetative communities adjacent to perennial and intermittent stream reaches. Trees can potentially exceed an overstory height of 10m and are frequently characterized by closed or multi-layered canopies depending on regeneration. Species within the San Pedro basin are largely dominated by two species, i.e. cottonwood and Goodding willow. Riparian species are largely winter deciduous. |
Agriculture
7 |
Crops actively cultivated (and irrigated). In the San Pedro River basin these are primarily found along the upper terraces of the riparian corridor and are dominated by hay and alfalfa. They are minimally represented in overall extent (less than 3% total cover) within the basin and are irrigated by ground and pivot-sprinkler systems. |
Urban
8 (Low and High Density) |
This is a land-use dominated by small ejidos (farming villages or communes), retirement homes, or residential neighborhoods (Sierra Vista). Heavy industry is represented by a single open-pit copper mining district near the headwaters of the San Pedro River at Cananea, Sonora (Mexico). |
Water
9 |
Sparse free-standing water is available in the watershed. This category would be mostly represented by perennial reaches of the San Pedro and Babocomari rivers with some attached pools or repressos (earthen reservoirs), tailings ponds near Cananea, ponds near recreational sites such as parks and golf courses, and sewage treatment ponds east of the city of Sierra Vista, Arizona. |
Barren
10 |
A cover class represented by large rock outcropping or active and abandoned mines (including tailings) that are largely absent of above-ground vegetation. |
Error matrix comparing aerial photo interpretation and 1973 digital land cover classification. Overall accuracy = 70%. Tau = 0.66. Cohen's Kappa (Khat) = 0.62; standard error = 0.027. (Skirvin et al., 2003)
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
Grand Total |
||
1 | 19 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
20 |
|
2 | 1 | 33 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 |
37 |
|
1973 | 3 | 0 | 1 | 16 | 1 | 0 | 2 | 0 | 0 | 0 | 0 |
20 |
LAND | 4 | 0 | 0 | 13 | 92 | 21 | 0 | 0 | 0 | 1 | 1 |
128 |
COVER | 5 | 0 | 0 | 14 | 11 | 96 | 0 | 0 | 0 | 0 | 1 | 122 |
CLASS | 6 | 0 | 0 | 3 | 0 | 2 | 15 | 0 | 0 | 0 | 0 | 20 |
7 | 0 | 0 | 3 | 0 | 7 | 1 | 10 | 0 | 0 | 1 | 22 | |
8 | 0 | 0 | 0 | 2 | 5 | 0 | 0 | 13 | 0 | 0 | 20 | |
9 | 0 | 0 | 4 | 3 | 6 | 0 | 1 | 0 | 3 | 3 | 20 | |
10 | 0 | 0 | 0 | 2 | 15 | 0 | 0 | 0 | 1 | 2 | 20 | |
Grand Total | 20 | 35 | 53 | 114 | 152 | 18 | 11 | 13 | 5 | 8 | 429 |
Land Cover Class |
1973 Map |
Photo- |
Number Correct |
Producer's |
User's |
1. Forest | 20 | 20 | 19 | 95 | 95 |
2. Woodland Oak | 37 | 35 | 33 | 94 | 89 |
3. Woodland Mesquite | 20 | 53 | 16 | 30 | 80 |
4. Grassland | 128 | 114 | 92 | 81 | 72 |
5. Desertscrub | 122 | 152 | 96 | 63 | 79 |
6. Riparian Forest | 20 | 18 | 15 | 83 | 75 |
7. Agriculture | 22 | 11 | 10 | 91 | 45 |
8. Urban | 20 | 13 | 13 | 100 | 65 |
9. Water | 20 | 5 | 3 | 60 | 15 |
10. Barren | 20 | 8 | 2 | 25 | 10 |
Total |
429 |
429 | 299 |
ENTITY AND ATTRIBUTE INFORMATION ATTRIBUTE LISTING FOR: SP_NALC73.VAT
COLUMN | ITEM NAME | WIDTH | OUTPUT | TYPE | N.DEC | ALTERNATE NAME | INDEXED? | ||
1 | VALUE | 4 | 10 | B | - | Indexed | |||
5 | COUNT | 4 | 10 | B | - | - | |||
9 | CLSPCT | 7 | 7 | N | - |
DOWNLOAD sp_land_cover.avl (NALC73 ArcView Legend)