Practice notes: spatial analysis + topographic analysis + hydrological analysis

Our recent internship in the company is to understand the domestic GIS platform KQGIS.
Familiar with the operation process. Let me share with you.

Space Analysis

Buffer analysis: [Toolbox] -> [Buffer analysis]
Overlay analysis: [Toolbox] -> [Overlay analysis] [Intersect] -> [Output field] (ALL) -> [Check (use block Processing) Purpose: Speed ​​up analysis]
Network analysis: [Optimal route] -> Analyze the route before adding a site
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Results after analyzing the road :
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Network analysis: vehicle routing problem (to solve our logistics and distribution problems in practical applications)
1) The number of trucks that need to be selected first
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2) Add stops and stops
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3) You can generate truck delivery routes.
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This software feels more operational than ArcMap It's more convenient, so you can try it if you are interested.

Topographic analysis

[Toolbox]->Contour extraction->Generate valley line/ridge line based on DEM->[Slope map production and output]-/[Slope map production and output]/Contour line to generate TIN
original map:
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contour Line map:
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valley line map:
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slope map:
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aspect map:
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contour line generation TIN
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hydrological analysis
[Toolbox] -> [hydrological analysis] -> [filling depression] -> [based on filling depression (flow direction grid)] ->[Based on flow direction (flow map)]
Flow direction map:
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flow map:
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raster river network extraction: based on flow rate from
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raster river network to vector river network:
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river network connection map:
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catchment area: (based on flow direction data and catchment Data)
(Here is the watershed data of a place) The
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above description is not specially marked, and you can directly search and use it in the toolbox to get the result. I hope you can try more and use it more.

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Origin blog.csdn.net/langezuibang/article/details/112573475