Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey, Fort Collins Science Center (FORT) Originator: Bureau of Land Management, Wyoming State Field Office Publication_Date: Unpublished Material Title: Wyoming Roads (BLM dataset updated to 2009 NAIP Imagery) Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: http://pubs.usgs.gov/ds/821/ Larger_Work_Citation: Citation_Information: Originator: U.S. Geological Survey, Fort Collins Science Center Publication_Date: 2013 Title: Large Scale Wyoming Transportation Data: A Resource Planning Tool Publication_Information: Publication_Place: USGS Data Series Publisher: Michael S. O'Donnell, Tammy S. Fancher, Aaron T. Freeman, Abra E. Ziegler, Zachary H. Bowen, and Cameron L. Aldridge Description: Abstract: The U.S. Geological Survey Fort Collins Science Center created statewide roads data for the Bureau of Land Management Wyoming State Office using 2009 aerial photography from the National Agriculture Imagery Program. The updated roads data resolves known concerns of omission, commission, and inconsistent representation of map scale, attribution, and ground reference dates which were present in the original source data. To ensure a systematic and repeatable approach of capturing roads on the landscape using on-screen digitizing from true color National Agriculture Imagery Program imagery, we developed a photogrammetry key and quality assurance/quality control protocols. Therefore, the updated statewide roads data will support the Bureau of Land Management’s resource management requirements with a standardized map product representing 2009 ground conditions. The updated Geographic Information System roads data set product, represented at 1:4,000 and +/- 10 meters spatial accuracy, contains 425,275 kilometers within eight attribute classes. The quality control of these products indicated a 97.7 percent accuracy of aspatial information and 98.0 percent accuracy of spatial locations. Approximately 48 percent of the updated roads data was corrected for spatial errors of greater than 1 meters relative to the pre-existing road data. Twenty-six percent of the updated roads involved correcting spatial errors of greater than 5 meters and 17 percent of the updated roads involved correcting spatial errors of greater than 9 meters. The Bureau of Land Management, other land managers, and researchers can use these new statewide roads data set products to support important studies and management decisions regarding land use changes, transportation and planning needs, transportation safety, wildlife applications, and other studies. The data set contains 8 different classifications for road type and constitutes an improvement to a 2002 BLM Wyoming State Office roads layer for both spatial and attribute accuracy. Purpose: The data set is appropriate for research and analysis that requires a high accuracy (+/- 10 m.) layer of roads in Wyoming that includes a classification of the road type for each feature. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2009 Currentness_Reference: Current with respect to 2009 NAIP Imagery Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Description_of_Geographic_Extent: State of Wyoming Bounding_Coordinates: West_Bounding_Coordinate: -111.051565 East_Bounding_Coordinate: -103.590973 North_Bounding_Coordinate: 45.207045 South_Bounding_Coordinate: 40.787699 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Roads Theme_Keyword: Development Theme_Keyword: Transportation Theme_Keyword: Highways Theme_Keyword: Trails Theme_Keyword: Infrastructure Place: Place_Keyword_Thesaurus: None Place_Keyword: Wyoming Place_Keyword: Northern Rockies Place_Keyword: WY Place_Keyword: United States Access_Constraints: Contact the Distributor. Use_Constraints: Contact the Distributor. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Bureau of Land Management (BLM), Wyoming State Field Office Contact_Person: Mary Wilson Contact_Address: Address_Type: physical address Address: 5353 Yellowstone Rd. City: Cheyenne State_or_Province: WY Postal_Code: 82009 Country: USA Contact_Address: Address_Type: mailing address Address: P.O. Box 1828 City: Cheyenne State_or_Province: Wyoming Postal_Code: 82003-1828 Contact_Voice_Telephone: (307) 775-6468 Contact_Facsimile_Telephone: (307) 775-6003 Contact_Electronic_Mail_Address: m75wilso@blm.gov Native_Data_Set_Environment: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 10.0 (Build 2414) Service Pack 3 (Build 3600) Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Five fully represented 7.5 minute quadrangles were randomly selected within each 1:100,000-scale quadrangle. All transportation features that fell within each selected 7.5 minute quadrangle were used for the accuracy assessment. A single point was randomly located along each individual line feature, resulting in a total of 105,286 points. Fifty percent of these points were then randomly selected to be used in quantifying the accuracy of those transportation features. The original points were subsampled because the sample size did not need to be so large in order to provide statistical significance. The final point data set (54,257 points) was used to evaluate attribute accuracy (feature classification via Entity_Label), spatial accuracy (considered accurate if within 10 meters), and commission (attribute and spatial accuracy both failed) at their respective locations. Additionally, omission errors were captured for each randomly selected 7.5 minute quadrangle while scanning each fully selected 7.5 minute quadrangle using the same visual scale established for developing the data (1:4,000). An evaluation was performed to assess the updated transportation data layers. This information was used to make corrections to all identified errors, and therefore, the latest version of the transportation data reflects all changes after errors were identified. O'Donnell et al (2013) provides figures 8 through 13 so data users can identify regions where accuracy was problematic and to inform where additional updates to the data should be emphasized. Most of the errors occurring in the data are located in the northeastern portion of the priority area assessed. This area has had a lot of new road development, and the pre-existing road data was also significantly worse within this region. Therefore, it is not a surprise that a large proportion of errors in the assessment are isolated to this area. QA/QC Statistics: Overall proportion of incorrect attributes (1,2671/54,257) = 2.3% Results were recorded and statistics calculated during the QA/QC process. Any identified errors were corrected after noting their presence. Logical_Consistency_Report: All data were processed to meet pre-determined topology rules (see below). Existing digitized roads were retained (if appropriate) regardless of width, however, new roads were only digitized if they appeared to be >/= 4 meters in width. Locations of roads were modified if they were further than 10 m from the visually observed road edge on the 2009 NAIP imagery. After all working blocks were digitized, all data were edge matched and attributes were assessed for agreements for all features spanning across edges. General Requirements for the Data Set: Roads that underpass other features, including other roads, railroads, buildings, and runways, were NOT coded for under-passing Traffic circles were classified as that of the highest class of road entering the traffic circle Cul-de-sacs were left dangling Roads are always digitized as a centerline Maintained access roads to rural residences were collected if they appeared to be greater than 100 meters long and greater than 4 meters wide and were coded as road class 1700210. All roads to well pads and oil and gas facilities were collected and coded as road class 1700210 Positional accuracy of existing data will be updated where it deviated from the edge of the feature (by approximately 10 meters) at 1:4,000 Topology Requirements: Must Not Overlap - Requires that lines not overlap with lines in the same feature class. Must Not Intersect -Line features must not cross or overlap each other. Lines can share endpoints. Must Not Have Pseudonodes ** -A line must touch more than one line from the same layer at its endpoints. This rule was only imposed on roads with like attributes. Must Not Have Dangles ** -Line feature must touch lines from the same feature class at both endpoints. This rule was only imposed on roads that were not legitimate dangles. Must Not Self Overlap ** -Line features must not overlap themselves. They can cross or touch themselves, but must not have coincident segments. Must Not Self-Intersect - A line feature must not intersect itself. Must Be Single Part - A line feature must not have more than one part. ** Topology rules imposed on the originating BLM roads feature class Completeness_Report: The data set is considered as complete as possible based on the 2009 NAIP imagery. While omissions may exist, all efforts were made to include all roads visible in the aerial imagery while accurately distinguishing between road types and other surface features (e.g., buried utility lines, etc.). At each of the 54,257 QA/QC sample points (see attribute accuracy for description of how these points were established), a visual pan of the sample area was performed to check for missing data (roads >/= 4 meters wide). Results were recorded and statistics calculated during the QA/QC process. Any identified errors were corrected after noting their presence. Number of 100K quadrangles falling within Wyoming: 64 Number of 7.5 minute quadrangles falling within Wyoming: 1824 Linear distance (km) of arcs represented in the originating data set: 395,362.0 km Linear distance (km) of arcs represented in the updated data set: 425,274.7 km QA/QC Statistics: Percentage of 7.5 minute quadrangles evaluated: 15.5% Total number of omission features: 2,274 Total length of commission features: 224.8 km Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: At each of the 54,257 QA/QC sample points (see attribute accuracy for description of how these points were established), the spatial accuracy of the arc was assessed to ensure the arc did not deviate from the actual road features (as seen in the 2009 NAIP imagery) by more than 10 meters. Results were recorded and statistics calculated during the QA/QC process. Any identified errors were corrected after noting their presence. Data for one area, identified by a comment in the NOTES field as 'Image Registration Issues' may have spatial accuracy issues due to mis-registration of the 2009 NAIP imagery. In this case, we used the 2006 NAIP imagery to assist with digitization and improving the accuracy. QA/QC Statistics: Overall proportion of incorrect spatial locations(1,112/54,257) = (1,112/54,257) 2.0% Total linear distance(km)that were modified and new roads; (fuzzy logic 1 m) 203,770.2 km (48.1%) Total linear distance(km)that were modified and new roads; (fuzzy logic 5 m) 111,680.9 km (26.3%) Total linear distance (km) that were modified and new roads; (fuzzy logic 9 m) 73,283.5 km (17.2%) Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Bureau of Land Managment (Wyoming) Publication_Date: Unpublished material Title: BLM-produced Roads Layer for Wyoming Geospatial_Data_Presentation_Form: Maps Data Type_of_Source_Media: digital tape media Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Source_Currentness_Reference: Current for the date range Source_Citation_Abbreviation: BLM Source_Contribution: 2002 Wyoming roads vector layer Source_Information: Source_Citation: Citation_Information: Originator: USDA-FSA-APFO (Aerial Photography Field Office) Publication_Date: 2009 Title: 1-meter Ground Sample Distance (GSD) digital ortho imagery from the National Agricultural Imagery Program (NAIP) Geospatial_Data_Presentation_Form: Maps Data Type_of_Source_Media: digital tape media Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 07312009 Ending_Date: 08152009 Source_Currentness_Reference: Current for the date range Source_Citation_Abbreviation: NAIP Source_Contribution: Aerial imagery for the state of Wyoming Process_Step: Process_Description: ROAD DIGITIZATION AND UPDATES FOR SPATIAL AND ATTRIBUTE ACCURACY Roads were systematically updated to the 2009 NAIP Imagery using a tracking/processing grid comprised of 330,260 988m x 780m polygons designed to facilitate digitization at a visual scale of 1:4,000. Each processing polygon was examined for omission and commission (except commission of the 1700211 class), spatial inaccuracy of 10m or greater and coding inaccuracies in the ENTITY_LABEL field. The original Wyoming roads data layer from the BLM was split into working blocks for each technician and each block was subsequently digitized and corrected for topology errors. Working blocks were then combined into a single data layer and features along the edges of adjacent working blocks were edge-matched and attributes reconciled. To ensure full coverage, the resulting data were then snapped to the Wyoming State line provided by BLM. Finally, topology errors were once again validated for the final combined data layer. Process_Date: 2013 Process_Step: Process_Description: DATA QUALITY ASSURANCE AND QUALITY CONTROL STEPS The last step in the processing was a QA/QC process that involved inspecting a random subset of the roads in the data set for positional and attribute accuracy. 1. Randomly select five 7.5 (roughly 1:24,000) size sample areas from each 1:100,000-scale quadrangle mapped. 2. After obtaining the five sample areas, generate one sample point per arc. 3. Randomly select 50% of these sample points to be individually inspected. 4. Evaluate the spatial accuracy (ensure arcs do not deviate from road features more than 10 meters). 5. Evaluate attribute/classification accuracy for the road at each sample point. 6. Perform a visual pan of the sample area to evaluate for missing data (roads >/= 4 meters wide) Results were recorded and statistics calculated during the QA/QC process. Any identified errors were corrected after noting their presence. Entity Label: Definition; Linear distance (km) for original data set; Linear distance (km) for updated data set (NULL): No attribute assigned; 34.8; 0 1700201: Primary route, class 1, symbol undivided; 1435.9; 1427.3 1700203: Primary route, class 1, divided, lanes separated; 92.9; 92.8 1700205: Secondary route, class 2, symbol undivided; 9,244.5; 9,435.1 1700209: Road, class 3, symbol undivided (Road or street, class 3); 33,313.1; 33,296.6 1700210: Road, class 4 (Road or street, class 4); 62,207.5; 101,611.9 1700211: Trail (class 5, other than four-wheel drive vehicle); 288,691.4; 269,069.3 1700402: Ramp in interchange (cloverleaf or interchange); 341.9; 346.8 211TT: Two track; 0; 9,995.0 Process_Date: 2013 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Node, network Point_and_Vector_Object_Count: 11782 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 12 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -111.000000 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: 0.000100 Ordinate_Resolution: 0.000100 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 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: Attribute Table for Wyoming Roads Vector Layer Entity_Type_Definition: Attribute descriptions Entity_Type_Definition_Source: Producer defined Attribute: Attribute_Label: ObjectID 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: Description of the feature geometry (Polyline). Attribute: Attribute_Label: ENTITY_LABEL Attribute_Definition: Road Classification Attribute_Definition_Source: Bureau of Land Management (BLM) Surface Management Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1700201 Enumerated_Domain_Value_Definition: Primary highway, hard surface - (Primary route, class 1, symbol undivided) Interstate highways (e.g., I-25, I-80 and I-90), distinguished by the presence of interchanges. These highways are accessed by way of ramps and have multiple lanes of traffic. The opposing traffic lanes can be divided by a median strip. This road is considered unseparated. Roads in this category should always be coded with a Route Number. Enumerated_Domain_Value_Definition_Source: BLM/USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1700203 Enumerated_Domain_Value_Definition: Primary highway, hard surface - (Primary route, class 1, divided, lanes separated) Interstate highways (e.g., I 25, I 80 and I 90), distinguished by the presence of interchanges. These highways are accessed by way of ramps and have multiple lanes of traffic. The opposing traffic lanes are separated by a wide median strip. Depicts opposing traffic lanes as two distinct lines in which case, the road is considered divided/separated. Roads in this category should always be coded with a Route Number. Enumerated_Domain_Value_Definition_Source: BLM/USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1700205 Enumerated_Domain_Value_Definition: Secondary highway, hard surface - (Secondary route, class 2, symbol undivided) Regionally important highways (e.g., US 287 and SR 10) that do not have limited access as required by class 1700201 and 1700203. It consists mainly of US and state highways. A road in this category must be hard-surface (concrete or asphalt). It has intersections with other roads, may be divided or undivided, and have multi-lane or single-lane characteristics. Roads in this category should always be coded with a Route Number. Enumerated_Domain_Value_Definition_Source: BLM/USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1700209 Enumerated_Domain_Value_Definition: Light duty, hard, or aggregate surface - (Road, class 3, symbol undivided (Road or street, class 3)) County highways, primary BLM roads, and primary Forest Service roads. The roads in this category are generally narrower than roads in class 1700205, can include hard surface (concrete or asphalt) or aggregate surface and are usually undivided with single-lane characteristics. These roads usually have a local name along with a route number and intersect with many other roads and driveways. County highway route numbers include a numeric county code followed by the route number (e.g., 23-117 = Sublette County Rd 117) Roads in this category do not always require a Route Number. Enumerated_Domain_Value_Definition_Source: BLM/USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1700210 Enumerated_Domain_Value_Definition: Streets, roads, graded/drained/natural surface - (Road, class 4 (Road or street, class 4)) Used for local traffic and usually has a single lane of traffic in each direction. In an urban area, this is a neighborhood road and street that is not a thoroughfare belonging in categories 1700205 or 1700209. In a rural area, this is a short-distance road connecting the smallest towns; the road may or may not have a state or county route number. Scenic park roads, unimproved or unpaved roads, minor residential roads, and industrial roads are included in this category. Enumerated_Domain_Value_Definition_Source: BLM/USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1700211 Enumerated_Domain_Value_Definition: 4WD, rough graded, drained, natural surface - (Trail (class 5, other than four-wheel drive vehicle)) Usually one-lane dirt trail, and is found almost exclusively in very rural areas. Sometimes the road is called a fire road or logging road and may include an abandoned railroad grade where the tracks have been removed. The existing data appears to be a combination of DLG codes 211(Trail) and 212 (Road, class 5, four-wheel drive). Resolution of the imagery does not lend itself to precise digitization and classification of features < 4 meters wide. Enumerated_Domain_Value_Definition_Source: BLM/USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 211TT Enumerated_Domain_Value_Definition: Two-tracked surface - (newly added) Attribute to be used strictly for classifying newly added (per 2009 NAIP) two-track features. Resolution of the imagery does not lend itself to precise digitization and classification of features < 4 meters wide. Enumerated_Domain_Value_Definition_Source: BLM/USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1700402 Enumerated_Domain_Value_Definition: Primary highway, hard surface - (Ramp in interchange (cloverleaf or interchange)) Access ramp, the portion of a road that forms a cloverleaf or limited access interchange Enumerated_Domain_Value_Definition_Source: BLM/USGS Attribute: Attribute_Label: ROUTE_NUMBER Attribute_Definition: Road Name/Identifier (when known or applicable) Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: When recorded, the 'ROUTE_NUMBER' may consist of an alphabetical or numeric prefix followed by a number identifying the road. Numeric prefix values are used when labeling county highways. County highway route numbers include a numeric county code followed by the route number (e.g., 23-117 = Sublette County Rd 117) Route Number County Code and Corresponding County: 1 Natrona 2 Laramie 3 Sheridan 4 Sweetwater 5 Albany 6 Carbon 7 Goshen 8 Platte 9 Big Horn 10 Fremont 11 Park 12 Lincoln 13 Converse 14 Niobrara 15 Hot Springs 16 Johnson 17 Campbell 18 Crooke 19 Uinta 20 Washakie 21 Weston 22 Teton 23 Sublette If an alphabetical prefix is used, it designates the managing agency or organization in charge of the road, followed by the road's route number (e.g., US 191 = United States Highway 191). Alphabetical Abbreviation Definitions: US - United States (National Highway or designation) BLM - Bureau of Land Management FS - Forest Service SR - State Route SV - Service Road Attribute: Attribute_Label: ROUTE_TYPE Attribute_Definition: Field maintained from the originating data set, but all values are NULL Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: NULL Attribute: Attribute_Label: ROUTE_NUMBER_SEC Attribute_Definition: Field maintained from the originating data set, but all values are NULL Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: NULL Attribute: Attribute_Label: ROUTE_TYPE_SEC Attribute_Definition: Field maintained from the originating data set, but all values are NULL Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: NULL Attribute: Attribute_Label: NOTES Attribute_Definition: Feature level notes of importance Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: Feature level notes of importance, for example, "Image Registration Issues" Attribute: Attribute_Label: Shape_Length Attribute_Definition: Internal distance of features in map projection units. Attribute_Definition_Source: ESRI defined Attribute_Domain_Values: Unrepresentable_Domain: Range of distance in map units representing each linear feature Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Bureau of Land Management (BLM), Wyoming State Field Office Contact_Person: Mary Wilson Contact_Address: Address_Type: mailing address Address: P.O. Box 1828 City: Cheyenne State_or_Province: Wyoming Postal_Code: 82003-1828 Country: USA Contact_Address: Address_Type: physical address Address: 5353 Yellowstone Rd. City: Cheyenne State_or_Province: WY Postal_Code: 82009 Country: USA Contact_Voice_Telephone: (307) 775-6468 Contact_Facsimile_Telephone: (307) 775-6003 Contact_Electronic_Mail_Address: m75wilso@blm.gov Resource_Description: File Geodatabase of Wyoming roads (accurate to +/- 10 m.), including categorical classification of road types. Distribution_Liability: Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the U.S. Government may be held liable for any damages resulting from its authorized or unauthorized use. Custom_Order_Process: Contact the Distributor Metadata_Reference_Information: Metadata_Date: 20130207 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Fort Collins Science Center (FORT) Contact_Person: FORT Metadata Specialist Contact_Address: Address_Type: Mailing and physical Address: U.S. Geological Survey, Fort Collins Science Center (FORT) 2150 Centre Avenue, Bldg C City: Fort Collins State_or_Province: CO Postal_Code: 80526-8118 Country: USA Contact_Voice_Telephone: (970) 226-9100 Contact_Facsimile_Telephone: (970) 226-9230 Contact_Electronic_Mail_Address: fort_metadata_team@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time