[Talk-ca] UBC, Vancouver orthography, and street alignment

[Tonkin, Bruce ILMB:EX]

Paul,

To verify your data you could also use the Province of BC's WMS
Services. Here are two that you may find useful for the UBC Area.

Road Network:
http://openmaps.gov.bc.ca/mapserver/base2?service=WMS&REQUEST=GetMap&SER
VICE=WMS&VERSION=1.1.1&LAYERS=DRA_DIGITAL_ROAD_ATLAS_LINE_SP&STYLES=&FOR
MAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT=TRUE&SRS=EPSG:4326&BBOX=-123.
265021881044,49.2499715666015,-123.232373077585,49.2776350737241&WIDTH=1
002&HEIGHT=849

100mm Orthophoto:
http://openmaps.gov.bc.ca/imagex/ecw_wms.dll?REQUEST=GetMap&SERVICE=WMS&
VERSION=1.1.1&LAYERS=REGIONAL_MOSAICS_BC_GVRD_WEST_XC100MM_UTM10_2009&ST
YLES=&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT=TRUE&SRS=EPSG:4326&B
BOX=-123.27242922767,49.2358356991024,-123.218014555238,49.2819415443068
&WIDTH=1002&HEIGHT=849


Thanks,

Bruce Tonkin

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Today's Topics:

   1. UBC, Vancouver orthography, and street alignment (Paul Norman)


----------------------------------------------------------------------

Message: 1
Date: Sat, 30 Oct 2010 21:18:03 -0700
From: "Paul Norman" <penorman at mac.com>
To: <talk-ca at openstreetmap.org>
Subject: [Talk-ca] UBC, Vancouver orthography, and street alignment
Message-ID: <000301cb78b2$9c973c60$d5c5b520$@mac.com>
Content-Type: text/plain;	charset="us-ascii"

UBC in Vancouver has been suffering from issues of building misalignment
because the Yahoo orthography is misaligned with the ground and suffers
from
distortion[1]. The City of Vancouver offers some mapping data [2] which
can
be used with OSM. I've taken 16 tiles that cover most of UBC and
corrected
most of the streets to these as these reflect the GPS traces, CanVec
data,
and my knowledge from being a student. They are also high resolution,
being
listed as 40cm, but I can easily make out smaller features. 

I've also done some micro-mapping around the SUB, Buchanan, the Chan
Center
and Rose garden, and down by CEME.

As the process to convert the .ecw files is a long and computationally
heavy
one if anyone wants the resulting slippymap which can be used with the
JOSM
slippymap plugin and is regularly at UBC I could burn them onto a CD.

I also have all of Vancouver processing to make a slippymap, but it has
only
been about 25 hours so it is not finished yet. If anyone wants that,
it'll
take multiple DVDs. Of course, anyone could recreate it from the
downloaded
files but anticipate gdal2tiles taking about 30-40 hours on a good
computer.

If anyone notices misaligned streets at UBC and isn't able to get the
Vancouver orthography working I'd appreciate knowing and I can align
them.

[1]
<http://wiki.openstreetmap.org/w/index.php?title=Canada:British_Columbia
:Van
couver&oldid=552230#University_of_British_Columbia>
[2] <http://data.vancouver.ca/datacatalogue/>




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