On Sun, 2012-10-28 at 20:51 -0700, Paul Norman wrote:
Background: I'm working on converting NHD to .osm format
NHD is an extremely large data set. It's about 25G of zipfiles and all of
this converted to .osm would total about 3 TB. This is about 10x-15x times
the size of planet.osm.
Paul Norman writes:
Does anyone have any thoughts on what should be done in a NHD translation
with these streams?
In a perfect world, we would be able to search by location and by
name, and get back a single .OSM file containing all the waterway=
segments with the same name.
It would be
On Oct 28, 2012, at 11:41 PM, Paul Norman wrote:
From: Michal Migurski [mailto:m...@teczno.com]
Subject: Re: [Talk-us] What to do with unnamed NHD streams
On Oct 28, 2012, at 10:29 PM, Paul Norman wrote:
The problem is you need to convert to .osm and *then* simplify. If you
do
On Oct 29, 2012, at 12:03 AM, Michal Migurski wrote:
Do you have any sample NHD extracts that might be usable for a test
drive?
All of NHD can be found at on the USGS FTP site, but you need to compile
gdal with 3rd-party toolkits to be able to use them. This is quite often a
pain.
I
From: Michal Migurski [mailto:m...@teczno.com]
Sent: Monday, October 29, 2012 12:04 AM
To: OpenStreetMap US Talk
Subject: Re: [Talk-us] What to do with unnamed NHD streams
On Oct 28, 2012, at 11:41 PM, Paul Norman wrote:
From: Michal Migurski [mailto:m...@teczno.com]
Subject: Re
From: Michal Migurski [mailto:m...@teczno.com]
Subject: Re: [Talk-us] What to do with unnamed NHD streams
On Oct 29, 2012, at 12:03 AM, Michal Migurski wrote:
Do you have any sample NHD extracts that might be usable for a test
drive?
All of NHD can be found at on the USGS FTP site
* Paul Norman penor...@mac.com [2012-10-28 20:51 -0700]:
A sensible solution in any NHD translation may be to drop any FCode 46003
(intermittent) streams without a name. It may also be worth dropping FCode
46006 (perennial) streams without a name.
I do a lot of tracing streams from aerial
On Oct 29, 2012, at 12:49 AM, Paul Norman wrote:
There are ways around this, by first de-duping the shared edges or
nodes. Topology preservation is not terribly difficult if you prepare
your data, for example by splitting lines and polygons at
intersections (as in your lake example),
Background: I'm working on converting NHD to .osm format
NHD is an extremely large data set. It's about 25G of zipfiles and all of
this converted to .osm would total about 3 TB. This is about 10x-15x times
the size of planet.osm.
There are three factors that lead to this large size. The third is
From: Michal Migurski [mailto:m...@teczno.com]
Sent: Sunday, October 28, 2012 8:58 PM
To: OpenStreetMap US Talk
Subject: Re: [Talk-us] What to do with unnamed NHD streams
Does [NHD] all come in shapefile form? The simplification would be a
relatively easy (though time-consuming) task
On Oct 28, 2012, at 10:29 PM, Paul Norman wrote:
From: Michal Migurski [mailto:m...@teczno.com]
Sent: Sunday, October 28, 2012 8:58 PM
To: OpenStreetMap US Talk
Subject: Re: [Talk-us] What to do with unnamed NHD streams
Does [NHD] all come in shapefile form? The simplification would
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