Equidistant segmentation of surface rivers in ArcGIS [gradient coloring, pollutant diffusion]

GIS Application , The finer rivers are abstracted into lines , Wide rivers are expressed by surface elements . However, in some business scenarios , It is necessary to study the river segmentation , And visual expression , Therefore, it is necessary to process the original river vector data first ：

Raw river data

1 Extract the centerline

1.1 feature to raster

Transformation tool — Convert to grid — Feature to grid

Reclassification

Symbolization

New line feature , Turn on edit mode ,” Customize — Toolbars —ArcScan“ Turn on ArcScan

1.2 Extract the centerline

Skip vectorization settings , Choose the right parameters , Then generate elements , Target select the new line feature

1.3 Delete redundant features in the centerline , And merge into a whole line

2 Equidistant split centerline

Select line features , open ” Editor — Division “, Split on demand

3 Line turning point

Number the points in sequence （ For a rainy day ）

star= 0
def num():
  global star
  star+=1
  return star

4 Tyson polygon

” Analysis tools — Domain analysis — Create Tyson polygons “

5 Extract river segments

5.1 Use the river vector plane to cut the Tyson polygon

” Analysis tools — Extraction analysis — tailoring “

5.2 Extract numbers from split points

” Analysis tools — Superposition analysis — Spatial connectivity “

6 application

Gradient color

River pollutant diffusion

https://baijiahao.baidu.com/s?id=1688687276479778308&wfr=spider&for=pc
2 Equidistant split line
https://blog.csdn.net/soderayer/article/details/121597741
3 Line turning point , And number in sequence
https://jingyan.baidu.com/article/fc07f9899362eb12ffe519f0.html
4 Tyson polygon
5 Tyson polygon joint initial river surface , Create a new face
6 Delete extra faces , Space links are assigned numbers order_