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Re: NTv2 file BC_98_05.gsb of British Columbia

From Alan Browne@21:1/5 to Fred Killet on Mon Nov 11 12:10:17 2024

On 2024-11-11 10:30, Fred Killet wrote:

Hello,
on the page "National Transformation Coordinate Conversions" under the
link "https://a100.gov.bc.ca/pub/mascotw/protected/convert.html" the
NTv2 files available for British Columbia are listed for download via
FTP. After accepting the Terms of Use and returning to MASCOTW
unfortunately, despite all my efforts, I was not able to download NTv2
files there. Could one please send me the NTv2 file BC_98_05.gsb by
email [email protected] as a ZIP file? Thank you for you help.
Kind regards, Fred

Did you try using an ftp program to grab the file (Such as Filezilla).

--
"It would be a measureless disaster if Russian barbarism overlaid
the culture and independence of the ancient States of Europe."
Winston Churchill

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From Fred Killet@21:1/5 to All on Tue Nov 12 17:31:37 2024

Yes, I tried Filezilla, but it did not work. May be I need some
parameters therefore.

Am 11.11.2024 um 18:10 schrieb Alan Browne:

On 2024-11-11 10:30, Fred Killet wrote:

Hello,
on the page "National Transformation Coordinate Conversions" under the
link "https://a100.gov.bc.ca/pub/mascotw/protected/convert.html" the
NTv2 files available for British Columbia are listed for download via
FTP. After accepting the Terms of Use and returning to MASCOTW
unfortunately, despite all my efforts, I was not able to download NTv2
files there. Could one please send me the NTv2 file BC_98_05.gsb by
email [email protected] as a ZIP file? Thank you for you help.
Kind regards, Fred

Did you try using an ftp program to grab the file (Such as Filezilla).

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From xtf@21:1/5 to All on Tue Nov 12 18:25:20 2024

W dniu 12.11.2024 o 17:31, Fred Killet pisze:

Yes, I tried Filezilla, but it did not work. May be I need some
parameters therefore.

Am 11.11.2024 um 18:10 schrieb Alan Browne:

On 2024-11-11 10:30, Fred Killet wrote:

Hello,
on the page "National Transformation Coordinate Conversions" under
the link "https://a100.gov.bc.ca/pub/mascotw/protected/convert.html"
the NTv2 files available for British Columbia are listed for download
via FTP. After accepting the Terms of Use and returning to MASCOTW
unfortunately, despite all my efforts, I was not able to download
NTv2 files there. Could one please send me the NTv2 file BC_98_05.gsb
by email [email protected] as a ZIP file? Thank you for you help.
Kind regards, Fred

Did you try using an ftp program to grab the file (Such as Filezilla).

Open source-code (Ctrl+U or Right Mouse Button -> View source code),
find a file link, copy it, paste and open it in a new tab.

--
I discover obsolete or useless technologies.

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From Bernd Rose@21:1/5 to Fred Killet on Tue Nov 12 19:54:14 2024

On Tue, 12 Nov 2024 17:31:37 +0100, Fred Killet wrote:

[NTv2 file BC_98_05.gsb download from a100.gov.bc.ca site]

Yes, I tried Filezilla, but it did not work. May be I need some
parameters therefore.

IMHO, the FTP server is just down. Any connection attempt times out and
a ping to the server comes back empty, as well. FWIW, the links (if the
server starts to work, again, at some time) can be found further down.
Maybe try the email contact listed at the end?

Apart from this, you probably know about the central Canadian open GIS
data website? After (free) registration you get access to NTv2 binary transformation files for several regions (including BC):

https://webapp.csrs-scrs.nrcan-rncan.gc.ca/geod/data-donnees/transformations.php

But the file BC_98_05.gsb isn't included, over there. Probably it would
be best to ask their webmaster/support about this. Maybe, there is sth.
wrong with that transformation file and it therefore is excluded from
download?

Another Canadian open data site comes back with even less results:

https://search.open.canada.ca/data/?search_text=gsb

HTH.
Bernd

<https://a100.gov.bc.ca/pub/mascotw/protected/convert.html>

National Transformation Coordinate Conversions ==============================================

The official software for conversion of coordinates from NAD27 to various versions of NAD83 or conversion between NAD83 versions (latitude/longitude
or UTM) in British Columbia is called the National Transformation Version
2.0 (NTv2.0).

The Canada-wide software was developed by the Federal Geodetic Survey
Division in cooperation with the provinces. For a web application visit https://webapp.csrs-scrs.nrcan-rncan.gc.ca/geod/tools-outils/ntv2.php
and to download a desktop application visit

https://webapp.csrs-scrs.nrcan-rncan.gc.ca/geod/tools-outils/applications.php*ntv2

Please refer to the ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/Disclaimer.txt
file before proceeding. By continuing you have implicitly agreed to the disclaimer.

ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/ReadMe.doc
Read Me in order to determine which transformation(s) you require.
Also the files
ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/Naming.txt
and
ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/Numbering.doc
list equivalent naming and numbering schemes used for the various NAD83 re-adjustment versions.

IMPORTANT - When performing transformations on Vancouver Island please refer
to the file ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/NVI-CRDwarning.doc

The following Transformations can be performed by downloading the
appropriate Binary Grid Shift file (.GSB) listed below for use / input
to the NTv2 software:

Or download via the ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/BC-Adjustment-Transformation.xls
Graphics Spread Sheet by clicking on the pale blue arrows within.

(Log on as: Anonymous - No Password Required)

NAD27 to NAD83(PRF1998): ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/BC_27_98.GSB
NAD27 to NAD83(CRD2000): ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/CRD27_00.GSB
NAD27 to NAD83(NVI2005): ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/NVI27_05.GSB
NAD27 to NAD83(PRF2005): ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/BC_27_05.GSB
NAD83(NMIP93) to NAD83(PRF1998): ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/BC_CSRS.GSB
NAD83(NMIP93) to NAD83(CRD2000): ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/CRD93_00.GSB
NAD83(NMIP93) to NAD83(NVI2005): ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/NVI93_05.GSB
NAD83(NMIP93) to NAD83(PRF2005): ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/BC_93_05.GSB
NAD83(PRF1998) to NAD83(CRD2000): ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/CRD98_00.gsb
NAD83(PRF1998) to NAD83(NVI2005): ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/NVI98_05.GSB
NAD83(PRF1998) to NAD83(PRF2005): ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/PRF2005a.GSB

For information on MASCOT in B.C., please contact:
mailto:[email protected]

Copyright (1996) Province of British Columbia.

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From Fred Killet@21:1/5 to All on Wed Nov 13 11:30:47 2024

Hello Bernd,
thanks for your effort.
I also think that the FTP server is not working. I have already written
to the geodesists of British Columbia and MASCOT, but unfortunately I
have not received a reply.
I have also visited the central Canadian open GIS data website, but have
not found the BC_98_05.gsb file there.
Maybe there is someone who can send me the file?
Kind regards, Fred

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Re: NTv2 file BC_98_05.gsb of British Columbia

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