Name: Contours 2ft

Display Field: index10ft

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: This data set represents generalized bare earth 2 foot elevation contours of Pottawattamie County, Iowa, in the UTM projection, Zone 15, NAD83 Datum. The contours were developed using elevation data from the state of Iowa's LiDAR program. The original 1 meter lidar grids were generalized to 3 meter resolution, and the contouring program applied with a 2 foot interval processed 10 feet at a time, so the program would have enough memory to complete. Contour lines were simplified using a 2 foot tolerance, and lines less than 100 ft in length were discarded. Ten foot index contours are identified in the attribute table. Contours crossing water features sometimes have a triangular appearance due to lack of lidar returns over water and should be ignored.

Service Item Id: c8efc962e7b0491d9725b0de426e911f

Copyright Text: One meter bare earth DEMs were developed from lidar point data by the Iowa Geological and Water Survey, by Chris Kahle and Andy Asell using LP360 software. Extraction of 2 foot contours was performed by Jesse Soukup and Jim Giglierano using Arc GIS 9.3 software.

Default Visibility: false

MaxRecordCount: 4000

Supported Query Formats: JSON, geoJSON, PBF

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Supports Datum Transformation: true

Extent:

XMin: -1.06888755262E7
YMin: 5035863.644400001
XMax: -1.05925699266E7
YMax: 5087394.176799998
Spatial Reference: 102100  (3857)

Drawing Info:

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HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• ID ( type: esriFieldTypeDouble, alias: ID )
• CONTOUR ( type: esriFieldTypeDouble, alias: CONTOUR )
• index10ft ( type: esriFieldTypeString, alias: index10ft, length: 2 )
• Shape_Leng ( type: esriFieldTypeDouble, alias: Shape_Leng )
• Indexes ( type: esriFieldTypeString, alias: Indexes, length: 50 )
• Index1 ( type: esriFieldTypeSmallInteger, alias: Index1 )
• Index2 ( type: esriFieldTypeSmallInteger, alias: Index2 )
• Index3 ( type: esriFieldTypeSmallInteger, alias: Index3 )
• Index4 ( type: esriFieldTypeSmallInteger, alias: Index4 )
• Index5 ( type: esriFieldTypeSmallInteger, alias: Index5 )
• Elev_CM ( type: esriFieldTypeInteger, alias: Elev_CM )
• GlobalID ( type: esriFieldTypeGlobalID, alias: GlobalID, length: 38 )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• Shape_Length ( type: esriFieldTypeDouble, alias: Shape_Length )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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