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DavidJDBA's diary

Recent diary entries

Can OSM help relieve traffic congestion?

Posted by DavidJDBA on 1 April 2013 in English (English)

Bing imagery shows a major traffic jam on northbound US-287 south of Laramie. So, I just added a bridge to the map over the UPRR tracks. Hopefully, this should allow traffic to being moving again!

Location: US 287, Tie Siding, Albany, Wyoming, 82070:82084, United States of America

Potlatch needs fixing

Posted by DavidJDBA on 2 December 2012 in English (English)

...as well as some other nearby ways near Torrington, WY; including US-26. So, I guess I'll use the working Potlatch to take care of those issues.

Location: Potlatch, South Torrington, Goshen, Wyoming, 82240, United States of America

South Platte River

Posted by DavidJDBA on 5 January 2012 in English (English)

I have added river banks and islands along the South Platte from Chatfield Dam, south of Denver, to the Nebraska/Colorado line. I must confess that I got distracted along the way and reclassified and aligned some nearby highways and railways along the way.

Interestingly, some of the imagery has been updated since I started and some of the river banks are considerably different from those I first mapped. It looks like the more recent images may have been gathered during a period of high water and the older pictures during a drought.

Oh well, back to Potlatch for some remapping...

-Dave

Location: County Road 93, Red Lion, Logan, Colorado, United States of America

South Platte River

Posted by DavidJDBA on 24 October 2011 in English (English)

I've been working the South Platte. Added river banks from Chatfield Dam (south of Denver) to east of Greeley. Someday, I'll get to Nebraska, and maybe meet whoever is adding the banks upstream from the Missouri. Also, there's a newly-opened stretch of the South Platte River trail along the east bank of the river through Littleton. Biked and GPXed this stretch; it's not yet in Bing imagery but is now in OSM!

No TIGER data and no imagery

Posted by DavidJDBA on 27 June 2011 in English (English)

While the car was being serviced, I walked the Streets of Southglenn with GPS in hand. This is a relatively new outdoor retail, mxed-use area that has replaced the aging Southglenn Mall. The mall still appears on the Bing imagery.
Using imperfectly-located GPS traces and waypoints uploaded to OSM and copious notes, I'm attempting to map this new development.
It will be interesting to see how my results compare with future imagery that may show the area.

-Dave

Location: South University Boulevard, Centennial, Arapahoe, Colorado, 80122, United States of America

Visitor to Broomfield Confirmed

Posted by DavidJDBA on 1 April 2011 in English (English)

After adding bridges and riverbanks to the Colorado River, I flew back to Denver and noticed what appears to be and extraterrestrial visitor in the Bing imagery between Tape Drive and Disk Drive in Broomfield. This morning, I see the OSM map has confirmed his presence.

Look now; I'm sure he'll be gone by this evening (Colorado time). Try viewing in Potlatch 2 with imagery and zoom 18 or 19.

-DJ

Location: Storage Tek Drive, Louisville, Boulder, Colorado, 80029, United States of America

Colorado Mountains and bing Imagery

Posted by DavidJDBA on 23 January 2011 in English (English)

I find the bing imagery much improved over the previous base. Aside from scale, the big difference in the imagery is seasonal. Snow cover and long dark shadows in the older photos made many areas appear to be black or white, and properly locating roads, let alone trails, was nearly impossible without some GPS assistance.

I'm currently updating the Gunnison and San Isabel National Forests using Potlatch 2 and memories from trips through the area. Also double-checking tags with the aid of government maps. Even US government maps do not always agree with each other, so I will not modify the tiger_review tags without further ground verification.

Location: Marshall Pass Road, Sargents, Saguache, Colorado, United States of America

East West Regional Trail, Douglas County, Colorado

Posted by DavidJDBA on 31 October 2010 in English (English)

I took advantage of yesterday's warm weather to ride and track a new portion of the Douglas County East West Regional Trail. I headed westward from the Dad Clark Trail south of Mountain Vista H.S. to where the E-W Trail joins the Spring Gulch Trail.
This mostly downhill run was scenic and fun! The dirt trail has a lot of curves, hills and moguls; but it's not really technically challenging (at least not at my speed).
With the GPS still recording, I also mapped a new leg of Plaza Drive (not entirely on the aerial photos yet) from Ericksson Blvd to Lucent. And the Highline Canal Trail has been realigned a bit in this area.
Of course, the ride between my house and the trail heads was uphill and against the wind in both directions.
-Dave

Location: East West Regional Trail, Kellytown, Douglas County, Colorado, 80126, United States of America

Merry Christmas

Posted by DavidJDBA on 23 December 2009 in English (English)

Working on suburban Denver retail areas just in time for last minute shoppers.

Location: Parkland Road, Lone Tree, Douglas, Colorado, 80112, United States of America

Suburban Denver

Posted by DavidJDBA on 30 July 2009 in English (English)

Hi,
I have been updating motorways, bike paths and everything in between around Denver, CO. Among other things I have noticed and tried to correct:
TIGER street data: Topology and nodes seem to be generally correct. However, curved streets often appear as diagonal lines slicing through fields, houses, etc. Some streets change names upon crossing another, and the TIGER data often misses this. Away from Denver, there are many streets that are badly displaced or do not exist at all. I'm correcting these using the Yahoo photos and changing the tiger:review tag to aerial and then deleting that field as I bike or drive through those locales and verify the configurations.
HIGHWAYS: The differences between primary-secondary, secondary-tertiary and tertiary-residential designations might well be arguable. However, there are some obvious discrepencies between the map and ground truth that I'm working on. E.g., a portion of Deer Creek Road is designated as a primary route. Although bicyclists who fight traffic in this canyon might disagree, I believe it should be designated tertiary or secondary at best.
I have changed US-285 between N. Turkey Creek and Sheridan to a trunk route from a combination of primary/motorway as it is not completely limited access, but the major intersections do have grade separtions.
There are people-years worth of work left to do around here, so feel free to join the fun.
-Dave

Location: South Teller Street, Lakewood, Jefferson, Colorado, 80235, United States of America
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