gapped or branched attribute check
DESCRIPTION
Gapped or Branched Attribute Check. Gapped or branched attribute tool The gapped or branched attribute tool is a two part process. It checks NHDflowline features for gaps or branching in GNIS Names by using GNIS ID’s. - PowerPoint PPT PresentationTRANSCRIPT
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Gapped or Branched Attribute Check
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Gapped or branched attribute tool
The gapped or branched attribute tool is a two part process. It checks NHDflowline features for gaps or branching in GNIS Names by using GNIS ID’s.
The second part checks NHDFlowline features for gaps or branching in reachcodes.
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Add Tool Box
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ArcToolbox:NHD ToolsDouble click on gapped_or_branched_attribute_check
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Browse to Select Feature Class
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Select NHDFlowline in your personal geodatabase (mdb)Add
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Use drop down to select Character Field “GNIS_ID”OK
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Script dialog box:Successful completionClose
Output – Same folder as your pgdb“1d_gob_gnis_id.dat” and“errnodes”
Note: If you do not have any errors the table will not be created
Note: You will not be able to see the .Dat file in Windows Explorer.
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Make GNIS fixes before running ReachCode check.When you run ReachCode check it will overwritethe GNIS errnode coverage.
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ArcMap: Add Data
Files errnodes and 1d_gob_gnis_id.dat are in same folder as your pgdbAdd
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Right click on 1d_gob_gnis_id.datJoins and RelatesRelate
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Populate table as shown belowOK
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Right click on 1d_gob_gnis_id.datOpen attribute table
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Select recordOptions, Related Tables, 1d_gob_gnis_id:NHDFlowline
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Associated NHDFlowline Records are selected
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Change point symbology to size 15 on errnodes point file
Double click on point symbol
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Zoom to selected records
In this case the GNIS ID (and GNIS Name) is disconnected
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Example: Error from 1d_gob_gnis_id table……..In this case the GNIS ID (and GNIS Name) is branched
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Resolve all errors in table
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ArcToolbox:NHD ToolsDouble click on gapped_or_branched_attribute_check
![Page 21: Gapped or Branched Attribute Check](https://reader033.vdocument.in/reader033/viewer/2022061522/568146c1550346895db3f51d/html5/thumbnails/21.jpg)
Browse to Select Feature Class
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Select NHDFlowline in your personal geodatabase (mdb)Add
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Use drop down to select Character Field “ReachCode”OK
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Script dialog box:Successful completion
Output – Same folder as your pgdb“1d_gob_reachcode.dat” and“errnodes”
Close
Note: If you do not have any errors the table will not be created
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Add “1d_gob_reachcode.dat” and “errnodes”
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Right click on 1d_gob_reachcode.datJoins and RelatesRelate
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Populate table as shown belowOK
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Right click on 1d_gob_reachcode.datOpen attribute table
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Select recordOptions, Related Tables, 1d_gob_reachcode:NHDFlowline
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Associated NHDFlowline Records are selected
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Zoom to selected records
In this case the ReachCode is disconnected
![Page 32: Gapped or Branched Attribute Check](https://reader033.vdocument.in/reader033/viewer/2022061522/568146c1550346895db3f51d/html5/thumbnails/32.jpg)
Resolve all errors in table