Notes on vector rivers

by

Nelson's log

Playing around with a vector river map of California. Some notes.

Datasets

The Natural Earth major river dataset is pretty good. Not quite detailed enough for the Dreamflows scale map. Also everything looks to be about 2000m north of the natural boundaries defined by counties, other river datasets, etc. Maybe I screwed up a projection?

After a 3 day delay the NHD finally gave me back a shapefile with detailed flowlines for Nevada County. It’s very detailed data but it still has fewer small creeks on it than Google Maps or Stamen Terrain Maps. It might just be seasonal data, or maybe someone has a more detailed set. I need to explore NHDPlus.

Nick was kind enough to give me a shapefile of major rivers in California; 5 meg shapefile, 648 objects. It looks like about the right level of detail for the Dreamflows map, I’m working with it now…

View original post 330 more words

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s


%d bloggers like this: