topic Re: Raster to Polyline problem in Geoprocessing Questions

Raster to Polyline problem

RudiniRudini — Mon, 10 Jul 2017 09:55:13 GMT

hello im new here,

so i have problem with my modeling. now im working to modeling migration and accumulation of hydrocarbon. i have got the model builder from someone who has similar project with me. i tried to follow the model builder but have problem when i used "raster to polyline" tools (see the attachment), it became a grid-line. first i think that the problem is my data but when i tried with another data the results still same, it became gridline. can anyone help me with this problem?? thank you

Re: Raster to Polyline problem

DanPatterson_Retired — Mon, 10 Jul 2017 10:12:33 GMT

why are you using 'raster to polyline' if you don't want lines? Are you looking for a polygon? If so, you would have to use the 'raster to polygon with a cell size large enough to close up the space between your polylines.

Re: Raster to Polyline problem

JayantaPoddar — Mon, 10 Jul 2017 12:14:47 GMT

Looking at the layers, I feel you are looking to delineate the stream network.

Are you looking for the polylines of Stream Network? In that Case, you could follow these steps .

1. Add a DEM

2. Fill Sink

3. Flow Direction

4. Flow Accumulation

5. Con Tool (Optional; To delineate appropriate Stream Network)

      - Select Flow accumulation as input conditional raster
      - Set 1 as constant value
      - Expression: Value > <a threshold pixel value>

6. Stream Link

7. Stream to Feature

See this link Identifying stream networks—Help | ArcGIS Desktop