3 datasets found
  1. u

    Two Foot Topographic Contours - Nashua (01070004) - smoothed

    • granit.unh.edu
    • nhgeodata.unh.edu
    • +3more
    Updated Oct 1, 2019
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    New Hampshire GRANIT GIS Clearinghouse (2019). Two Foot Topographic Contours - Nashua (01070004) - smoothed [Dataset]. https://granit.unh.edu/maps/ff4b7339e1d8436480b6f821e381da4e
    Explore at:
    Dataset updated
    Oct 1, 2019
    Dataset authored and provided by
    New Hampshire GRANIT GIS Clearinghouse
    Area covered
    Description

    This data set represents smoothed, 2-foot bare earth contours (isolines) for the Nashua (01070004) HUC 8 unit. It was derived from a data set which was compiled from LIDAR collections in NH available as of spring, 2019. The raster was filtered using the ArcGIS FOCAL STATISTICS tool with a 3x3 circular neighborhood. The contours were generated using the ArcGIS CONTOUR tool while applying a Z factor of 3.2808 to convert the elevation values from meters to feet. The filtered contours were then smoothed using the ArcGIS SMOOTH LINE tool. The data include an INDEX field with values of 10 and 100 to flag 10 and 100-foot contours. When viewed using this service, contours become visible at scales greater than 1:10,000.

  2. a

    Contour 2ft 0107000404 smooth

    • new-hampshire-geodata-portal-1-nhgranit.hub.arcgis.com
    • hub.arcgis.com
    Updated Oct 1, 2019
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    New Hampshire GRANIT GIS Clearinghouse (2019). Contour 2ft 0107000404 smooth [Dataset]. https://new-hampshire-geodata-portal-1-nhgranit.hub.arcgis.com/datasets/contour-2ft-0107000404-smooth
    Explore at:
    Dataset updated
    Oct 1, 2019
    Dataset authored and provided by
    New Hampshire GRANIT GIS Clearinghouse
    Area covered
    Description

    This data set represents smoothed, 2-foot bare earth contours (isolines) for the Nashua (01070004) HUC 8 unit. It was derived from a data set which was compiled from LIDAR collections in NH available as of spring, 2019. The raster was filtered using the ArcGIS FOCAL STATISTICS tool with a 3x3 circular neighborhood. The contours were generated using the ArcGIS CONTOUR tool while applying a Z factor of 3.2808 to convert the elevation values from meters to feet. The filtered contours were then smoothed using the ArcGIS SMOOTH LINE tool. The data include an INDEX field with values of 10 and 100 to flag 10 and 100-foot contours. When viewed using this service, contours become visible at scales greater than 1:10,000.

  3. u

    Contour 2ft 0107000403 smooth

    • granit.unh.edu
    • nh-granit-nhgranit.hub.arcgis.com
    Updated Oct 1, 2019
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    New Hampshire GRANIT GIS Clearinghouse (2019). Contour 2ft 0107000403 smooth [Dataset]. https://granit.unh.edu/datasets/NHGRANIT::two-foot-topographic-contours-nashua-01070004-smoothed?layer=2
    Explore at:
    Dataset updated
    Oct 1, 2019
    Dataset authored and provided by
    New Hampshire GRANIT GIS Clearinghouse
    Area covered
    Description

    This data set represents smoothed, 2-foot bare earth contours (isolines) for the Nashua (01070004) HUC 8 unit. It was derived from a data set which was compiled from LIDAR collections in NH available as of spring, 2019. The raster was filtered using the ArcGIS FOCAL STATISTICS tool with a 3x3 circular neighborhood. The contours were generated using the ArcGIS CONTOUR tool while applying a Z factor of 3.2808 to convert the elevation values from meters to feet. The filtered contours were then smoothed using the ArcGIS SMOOTH LINE tool. The data include an INDEX field with values of 10 and 100 to flag 10 and 100-foot contours. When viewed using this service, contours become visible at scales greater than 1:10,000.

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Share
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Email
Click to copy link
Link copied
Close
Cite
New Hampshire GRANIT GIS Clearinghouse (2019). Two Foot Topographic Contours - Nashua (01070004) - smoothed [Dataset]. https://granit.unh.edu/maps/ff4b7339e1d8436480b6f821e381da4e

Two Foot Topographic Contours - Nashua (01070004) - smoothed

Explore at:
Dataset updated
Oct 1, 2019
Dataset authored and provided by
New Hampshire GRANIT GIS Clearinghouse
Area covered
Description

This data set represents smoothed, 2-foot bare earth contours (isolines) for the Nashua (01070004) HUC 8 unit. It was derived from a data set which was compiled from LIDAR collections in NH available as of spring, 2019. The raster was filtered using the ArcGIS FOCAL STATISTICS tool with a 3x3 circular neighborhood. The contours were generated using the ArcGIS CONTOUR tool while applying a Z factor of 3.2808 to convert the elevation values from meters to feet. The filtered contours were then smoothed using the ArcGIS SMOOTH LINE tool. The data include an INDEX field with values of 10 and 100 to flag 10 and 100-foot contours. When viewed using this service, contours become visible at scales greater than 1:10,000.

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