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I have been editing for a while now

Posted by mattmaxon on 30 March 2009 in English (English)

I have been editing OSM for a while now in 5 areas

*San Gabriel Mountains
*Verdugo Mountains
*San Fernando Valley

These are all in the Los Angeles area of Southern California USA

Sunland is my hometown and know it well, I like to experiment with various render features here

Burbank is the area where I work

The mountains is where I play

San Fernando Valley is well.... a mess. Everything I do in the other areas seems to flow to here and affect the SFV

I have decided to use the City of Los Angeles NavigateLA GIS as the source for names and road classifications

alley=(highway=service, service=alley)

This is my official source for unnamed streets, unless I happen to be nearby.

Which brings up an interesting question when citing source it seems source for what? Source for the line on the map, source for the name, source for the various road features etc....

I have a Kensington Expert Mouse (Trackball) and find the programmable buttons useful for those common tags when editing with Potlatch, though for some reason the ALT modifier doesn't work...Plenty of available combination's with SHIFT & CTRL

regarding the gates

Posted by mattmaxon on 16 February 2009 in English (English)

Locally there are many gates that are closed only under certain conditions

Generally these are "poor" weather, but most of the dirt roads are closed after rain etc...

How does one document these caveats

OHV tag and access=not_recommended

Posted by mattmaxon on 16 February 2009 in English (English)

many of the tags don't seem to adequately cover the permitted use

Here in the US, public lands mangers deal with motorcycles, atv, 4WD etc with a single term

Off Highway Vehicle or OHV

There are OHV parks run by the US State of California, BLM, Forest Service, private property owners, and other government agencies

These vehicles are generally not permitted on general purpose roads though not always, connections are sometimes allowed, they are not subject to certain vehicle registration, insurance, equipment, and operator requirements

here 4WD doesn't cover it as some OHVs are 2WD and perfectly capable of proceeding, some are only passable by motorcycle or highly modified jeeps etc

Seems like an OHV tag would be useful.

another designation under access would be helpful too

Many times while a certain use is permitted it is not recommended

access=not_recommended would better cover certain situations


Posted by mattmaxon on 16 February 2009 in English (English)

The track at this location is following a firebreak, all be it one that hasn't been maintained in many many years

This is a common mode of Cross Country or XC travel here locally as trying to penetrate the dense chaparral is a painful and frustration experience for most.

Most of the currently maintained firebreaks are done with firefighting bulldozers caterpillar model D8 or similar heavy equipment

even so they frequently are very steep at 45° - 70°+ degrees

Less frequently these routes are cleared by hand using inmates

motorcycle=(sometimes yes genearally no)
motorcar= (sometimes yes genearally no) this would be better designated with 4WD=(sometimes yes genearally no)

Location: Josephine Peak Road, Hidden Springs, Los Angeles County, California, 91011, United States of America

Public data

Posted by mattmaxon on 16 February 2009 in English (English)

There is a great deal of publically available data from various government agencies

most of this is in SHP or SDTS format

I can convert this to a GPX but... the system rejects it

If I try to add it as a track It is a jumble of lines connecting unrelated / out of sequence segments

Any suggestions as to how to format and upload upload this data ?

Hiking Trails & Mountain roads

Posted by mattmaxon on 16 February 2009 in English (English)

I have a great deal of data collected hiking the local mountain trails here in the Los Angeles California region

It is unclear to me what classification I should be using for these trails

highway=footway does not seem quite right to me

highway=path seems a better fit as many different users are allowed by administrators


This is the designation for the Pacific Crest National Scenic Trail (PCT) I have been using for my survey data

While sac_scale may be common in europe here we use the Yosemite Decimal System

for the PCT the YDS rating would be class 1

while some trails locally would have a YDS rating class 3 or class 4

Also there are many many roads in the mountains here within the "Angeles National Forest" This is a reserve administered by the United States Department of Agriculture, Forest Service (USDA Forest Service or FS) many of these roads locally are open to FS vehicles and have locked gates and are mostly unpaved

"Forest" is a bit of a misnomer in describing this area as mostly there is no forest, there are forested areas and mostly chaparral scrub land with inaccessible very steep terrain

I have been using the following designation


the "access" value doesn't really do it for me. FS users with the proper key can open the gate. The forest service calls this administrative access, I have an administrative pass and gate key for hiking trail maintenance

How do I go about getting access=administrative as a tag?