11 replies to this topic

[A. Fenix]

Hello beloved mappers,

anyone out there aware of a site that has 25m dem data for B.C. available for free? the only hillshade that i've found thus far is so coarse that my map is looking more like a checker board than anything else.

thanks in advance!!!

analisa

[erik]

I've seen conflicting info as to whether SRTM collected higher res. 30m data for the entire world but it has been released only for the US. Personally I would bet it exists, but has not been released.

http://en.wikipedia....ography_Mission

erik

[Hans van der Maarel]

I've seen conflicting info as to whether SRTM collected higher res. 30m data for the entire world but it has been released only for the US. Personally I would bet it exists, but has not been released.

I agree. I seem to recall reading something to this effect.

[rudy]

Geobase has DEM data at scales of 1:50,000 and 1:250,000 for BC and most of the rest of the country. See product specs and download page. There is also other topographic data available for free from Geogratis. Look for CanVec or NTDB on the list.

The BC government has 25 m resolution DEMs but sells it for $500 a tile. The provincial government also has some topographic data available for download.

[Charles Syrett]

If you don't mind ready-made shaded relief imagery, already projected, and at two different sun angles, you can get them for free here: ftp://ftp.elp.gov.bc.ca/dist/imgwhse/hilshd/
The challenge is to figure out which tiles you need. But hey, it's free!

Charles Syrett
Map Graphics
http://www.mapgraphics.com

[A. Fenix]

Thank you all so much for your replies. For those of you hungry for affordable British Columbia data, you can download a zipped spreadsheet that i made containing the best sites (for my particular needs) that I found for data.

ftp://ftp.ecotrust.org/pub/outgoing/even_months/BC_datalist

FYI: if you don't have any money for DEM data, than you'll need to Geobase, a fantastic site with great navigation options for finding the DEM quads that you need. However, you'll need to do all the mosaicing yourself depending on your area of interest.

With a little luck, you'll be seeing some of this data showcased on a map...

Thanks again!

analisa

[Hans van der Maarel]

With a little luck, you'll be seeing some of this data showcased on a map...

Would love to see that of course

I'll try and add those links to our Resources section, it looks like it could do with an upgrade...

[rudy]

For those of you hungry for affordable British Columbia data, you can download a zipped spreadsheet that i made containing the best sites (for my particular needs) that I found for data.

ftp://ftp.ecotrust.org/pub/outgoing/even_months/BC_datalist

The link opens up an ftp site in my web browser with a link to the spreadsheet you mention. I can download the file but when I try to open it, nothing seems to be there.

[Charles Syrett]

For those of you hungry for affordable British Columbia data, you can download a zipped spreadsheet that i made containing the best sites (for my particular needs) that I found for data.

ftp://ftp.ecotrust.org/pub/outgoing/even_months/BC_datalist

The link opens up an ftp site in my web browser with a link to the spreadsheet you mention. I can download the file but when I try to open it, nothing seems to be there.

Same here. Nothing. Being located in BC, I'm particularly interested in this information! Can you please re-post? Thanks!

Charles Syrett
Map Graphics
http://www.mapgraphics.com

[A. Fenix]

Sorry everybody! I lost track of this thread and had no idea that the zip file went capoot on me (not sure why)

Anyway, I just re-uploaded both the excel file and a new zipped version of it to the same spot.

ftp://ftp.ecotrust.org/pub/outgoing/even_months/BC_datalist/

Please don't ever hesitate to send me a personal "what-the-heck?" message if you ever need to get my immediate attention. Which you just may need to, considering that my I.T. team is convinced that I have a "bionic force field" which causes technological devices to do quirky things around me...

analisa

[rudy]

Thanks analisa - looks promising.

[A. Fenix]

Hello everyone,

I've received a few emails from folks that were trying to download the excel spreadsheet. Due to an automated folder clean, that data is no longer available. I re-uploaded the excel spreadsheet to our ftp site (ftp://ftp.ecotrust.org/pub/outgoing/odd_months/BC_datalist) but it will only be available until the end of March. I am also attaching a pdf of the table to this post.

Hope this helps,

analisa

Attached Files

•  BC_Data_Sources.pdf   28.69K   145 downloads