Comments (1)
This is done but it is worth noting that joining fwa_watersheds_upstream_area
back to streams is not quite as simple as might be expected. Joining on the watershed codes kind of works if selecting DISTINCT matches (one stream can match >1 watersheds) - but some streams also have 0 matching watersheds with the same watershed code. So, while it takes much longer to process it is easiest to just do a spatial join based on the centroid of the stream line. Note that selecting distinct matches is still required because watersheds boundaries can be co-incident with stream lines, more than one watershed can intersect a point on a stream.
Anyway, to get area upstream of stream segments:
SELECT DISTINCT ON (linear_feature_id)
s.linear_feature_id,
ua.upstream_area
FROM whse_basemapping.fwa_stream_networks_sp s
INNER JOIN whse_basemapping.fwa_watersheds_poly w
ON ST_Intersects(ST_pointonsurface(s.geom), w.geom)
INNER JOIN whse_basemapping.fwa_watersheds_upstream_area ua
ON w.watershed_feature_id = ua.watershed_feature_id
WHERE NOT s.wscode_ltree <@ '999'
ORDER BY s.linear_feature_id, s.stream_order
from fwapg.
Related Issues (20)
- ensure makefile bails on errors
- load of named point features and obstructions fail
- update docker files
- scheduled load from data/FWA_BC.gdb.zip failure does not stop build
- demo web app
- add action to run job weekly
- add function for measuring gradient at a given location over given interval
- add channel width and discharge modelling HOT 1
- only run job if source files modified
- cross border data additions HOT 1
- build fails, can't find FWA_Upstream function HOT 2
- FWA named points fails to load HOT 1
- update discharge/channel width data with FWA updates
- unexpected results for fwa_watershedstream() HOT 2
- assessment watersheds -> streams lookup HOT 1
- discharge download
- functions/docs cleanup
- add visibilityfilter for better cartography
- incorrect channel widths HOT 3
- value added stream order data currently empty HOT 1
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from fwapg.