Re: [GRASS-user] Copy an existing location
"Bartolomei.Chris" writes: > Hi Rainer, > I had stated that I wasn't 100% sure and just to look into it - I had > recalled reading about lossy and lossless data some time ago. > For a quick look into it, Wikipedia has a decent article > (https://en.wikipedia.org/wiki/Lossless_compression and > https://en.wikipedia.org/wiki/Lossy_compression) ... as I briefly > looked through it just now, it appears gz and zip use a lossless > algorithm so they should be fine to use. Tar (if I remember right) > concatenates files into an archive and is not a compression tool. > It looks like lossy algorithms are used more for music and video and some > images according to the articles. > I was just putting up a yellow flag as a caution to look into it as I > wasn't sure and I wouldn't want to give someone bad advice. OK - so we can clarify: *File Compression* is per definition lossless (zip, gz, 7z, bz, ...). Otherwise you would not be able to restore ftom archives. Compression of *content of the file* can be lossy (mp3, jpeg, ...). Cheers, Rainer > > Chris Bartolomei P.E. > Engineer/Scientist > ENSCO, Inc. > bartolomei.ch...@ensco.com > > From: Rainer M Krug [rai...@krugs.de] > Sent: Friday, April 29, 2016 12:35 AM > To: Bartolomei.Chris > Cc: Janet Choate; grass list > Subject: Re: Copy an existing location > > "Bartolomei.Chris" writes: > > [snip (4 lines)] > >> The reason I say this is the file >> compression I suggested may cause some data loss ... look into >> lossless data compression algorithms and you'll see what I'm talking >> about. > > Could you please elaborate and give some references where lossless data > compression (gz, zip) may cause data loss? Especially tar.gz is used for > ages in archival and backup? > > Rainer > > > [snip (46 lines)] > -- > Rainer M. Krug > email: Rainerkrugsde > PGP: 0x0F52F982 > > The information contained in this email message is intended only for the use > of the individual(s) to whom it is addressed and may contain information that > is privileged and sensitive. If you are not the intended recipient, or > otherwise have received this communication in error, please notify the sender > immediately by email at the above referenced address and note that any > further dissemination, distribution or copying of this communication is > strictly prohibited. > > The U.S. Export Control Laws regulate the export and re-export of technology > originating in the United States. This includes the electronic transmission > of information and software to foreign countries and to certain foreign > nationals. Recipient agrees to abide by these laws and their regulations -- > including the U.S. Department of Commerce Export Administration Regulations > and the U.S. Department of State International Traffic in Arms Regulations -- > and not to transfer, by electronic transmission or otherwise, any content > derived from this email to either a foreign national or a foreign destination > in violation of such laws. > ___ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user -- Rainer M. Krug email: Rainerkrugsde PGP: 0x0F52F982 signature.asc Description: PGP signature ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Copy an existing location
Hi Rainer, I had stated that I wasn't 100% sure and just to look into it - I had recalled reading about lossy and lossless data some time ago. For a quick look into it, Wikipedia has a decent article (https://en.wikipedia.org/wiki/Lossless_compression and https://en.wikipedia.org/wiki/Lossy_compression) ... as I briefly looked through it just now, it appears gz and zip use a lossless algorithm so they should be fine to use. Tar (if I remember right) concatenates files into an archive and is not a compression tool. It looks like lossy algorithms are used more for music and video and some images according to the articles. I was just putting up a yellow flag as a caution to look into it as I wasn't sure and I wouldn't want to give someone bad advice. Chris Bartolomei P.E. Engineer/Scientist ENSCO, Inc. bartolomei.ch...@ensco.com From: Rainer M Krug [rai...@krugs.de] Sent: Friday, April 29, 2016 12:35 AM To: Bartolomei.Chris Cc: Janet Choate; grass list Subject: Re: Copy an existing location "Bartolomei.Chris" writes: [snip (4 lines)] > The reason I say this is the file > compression I suggested may cause some data loss ... look into > lossless data compression algorithms and you'll see what I'm talking > about. Could you please elaborate and give some references where lossless data compression (gz, zip) may cause data loss? Especially tar.gz is used for ages in archival and backup? Rainer [snip (46 lines)] -- Rainer M. Krug email: Rainerkrugsde PGP: 0x0F52F982 The information contained in this email message is intended only for the use of the individual(s) to whom it is addressed and may contain information that is privileged and sensitive. If you are not the intended recipient, or otherwise have received this communication in error, please notify the sender immediately by email at the above referenced address and note that any further dissemination, distribution or copying of this communication is strictly prohibited. The U.S. Export Control Laws regulate the export and re-export of technology originating in the United States. This includes the electronic transmission of information and software to foreign countries and to certain foreign nationals. Recipient agrees to abide by these laws and their regulations -- including the U.S. Department of Commerce Export Administration Regulations and the U.S. Department of State International Traffic in Arms Regulations -- and not to transfer, by electronic transmission or otherwise, any content derived from this email to either a foreign national or a foreign destination in violation of such laws. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Copy an existing location
"Bartolomei.Chris" writes: [snip (4 lines)] > The reason I say this is the file > compression I suggested may cause some data loss ... look into > lossless data compression algorithms and you'll see what I'm talking > about. Could you please elaborate and give some references where lossless data compression (gz, zip) may cause data loss? Especially tar.gz is used for ages in archival and backup? Rainer [snip (46 lines)] -- Rainer M. Krug email: Rainerkrugsde PGP: 0x0F52F982 signature.asc Description: PGP signature ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Copy an existing location
On 29/04/16 08:34, Blumentrath, Stefan wrote: Yes, and maybe allowing for multiple input would be nice for such use cases as well!? For rasters this could possibly be done by adding the option to pack a group. Moritz ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Copy an existing location
Yes, and maybe allowing for multiple input would be nice for such use cases as well!? Another possibly useful enhancement may be a kind of wrapper script (let`s call it m.pack/unpack) which would even allow for packing (and unpacking) raster and vector maps together in one archive...? Cheers Stefan -Original Message- From: grass-user [mailto:grass-user-boun...@lists.osgeo.org] On Behalf Of Markus Neteler Sent: 28. april 2016 14:35 To: Paulo van Breugel Cc: grass list Subject: Re: [GRASS-user] Copy an existing location On Thu, Apr 28, 2016 at 9:54 AM, Paulo van Breugel wrote: > There is also the r.pack function. Yes,this is a safe way to go (r.pack - r.unpack | v.pack - v.unpack). Hope this suggestion is addressed one day: r|v.unpack: add parameter to create new location https://trac.osgeo.org/grass/ticket/2459 which would be handy for the user receiving the data. Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Copy an existing location
On Thu, Apr 28, 2016 at 9:54 AM, Paulo van Breugel wrote: > There is also the r.pack function. Yes,this is a safe way to go (r.pack - r.unpack | v.pack - v.unpack). Hope this suggestion is addressed one day: r|v.unpack: add parameter to create new location https://trac.osgeo.org/grass/ticket/2459 which would be handy for the user receiving the data. Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Copy an existing location
There is also the r.pack function. But what I would probably do is to copy the whole location folder, delete the layers you don't want to include, and then zip / 7zip the whole folder (which is lossless) or any other suitable format. On Thu, Apr 28, 2016 at 9:44 AM, Bartolomei.Chris < bartolomei.ch...@ensco.com> wrote: > Hi Janet ... I was just thinking about the suggestion I sent ... you may > be better off exporting the rasters and then having the user import them > into a like-named mapset with the projection set to what the original > rasters are in (and set the region and resolution correctly prior to > import). The reason I say this is the file compression I suggested may > cause some data loss ... look into lossless data compression algorithms and > you'll see what I'm talking about. > It may be irrelevent, but I'm not 100% sure... something to be aware of > though. > > Chris Bartolomei P.E. > Engineer/Scientist > ENSCO, Inc. > bartolomei.ch...@ensco.com > > From: grass-user [grass-user-boun...@lists.osgeo.org] On Behalf Of Janet > Choate [jsc@gmail.com] > Sent: Wednesday, April 27, 2016 7:00 PM > To: grass list > Subject: [GRASS-user] Copy an existing location > > Hello GRASS community, > Does anyone have advice on duplicating an existing GRASS location with > only certain rasters maps? > For example, I have an existing GRASS location with a PERMANENT mapset > that contains 100 maps. I want to create a copy of this existing location > (with it's current projection) to a new location, which will only contain > 10 of the rater maps from the existing location. > I want to be able to transfer a new 'cleaned-up' version of my GRASS > location to another user. > thank you, > Janet > > > > The information contained in this email message is intended only for the > use of the individual(s) to whom it is addressed and may contain > information that is privileged and sensitive. If you are not the intended > recipient, or otherwise have received this communication in error, please > notify the sender immediately by email at the above referenced address and > note that any further dissemination, distribution or copying of this > communication is strictly prohibited. > > The U.S. Export Control Laws regulate the export and re-export of > technology originating in the United States. This includes the electronic > transmission of information and software to foreign countries and to > certain foreign nationals. Recipient agrees to abide by these laws and > their regulations -- including the U.S. Department of Commerce Export > Administration Regulations and the U.S. Department of State International > Traffic in Arms Regulations -- and not to transfer, by electronic > transmission or otherwise, any content derived from this email to either a > foreign national or a foreign destination in violation of such laws. > ___ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Copy an existing location
Hi Janet ... I was just thinking about the suggestion I sent ... you may be better off exporting the rasters and then having the user import them into a like-named mapset with the projection set to what the original rasters are in (and set the region and resolution correctly prior to import). The reason I say this is the file compression I suggested may cause some data loss ... look into lossless data compression algorithms and you'll see what I'm talking about. It may be irrelevent, but I'm not 100% sure... something to be aware of though. Chris Bartolomei P.E. Engineer/Scientist ENSCO, Inc. bartolomei.ch...@ensco.com From: grass-user [grass-user-boun...@lists.osgeo.org] On Behalf Of Janet Choate [jsc@gmail.com] Sent: Wednesday, April 27, 2016 7:00 PM To: grass list Subject: [GRASS-user] Copy an existing location Hello GRASS community, Does anyone have advice on duplicating an existing GRASS location with only certain rasters maps? For example, I have an existing GRASS location with a PERMANENT mapset that contains 100 maps. I want to create a copy of this existing location (with it's current projection) to a new location, which will only contain 10 of the rater maps from the existing location. I want to be able to transfer a new 'cleaned-up' version of my GRASS location to another user. thank you, Janet The information contained in this email message is intended only for the use of the individual(s) to whom it is addressed and may contain information that is privileged and sensitive. If you are not the intended recipient, or otherwise have received this communication in error, please notify the sender immediately by email at the above referenced address and note that any further dissemination, distribution or copying of this communication is strictly prohibited. The U.S. Export Control Laws regulate the export and re-export of technology originating in the United States. This includes the electronic transmission of information and software to foreign countries and to certain foreign nationals. Recipient agrees to abide by these laws and their regulations -- including the U.S. Department of Commerce Export Administration Regulations and the U.S. Department of State International Traffic in Arms Regulations -- and not to transfer, by electronic transmission or otherwise, any content derived from this email to either a foreign national or a foreign destination in violation of such laws. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Copy an existing location
I would create a new mapset (in the same "location") then use g.copy (or the
gui) to copy the rasters from PERMANENT to the new mapset.
You can then pack the mapset directory (folder) (".tar" or ".gz" or ".zip") and
send it to the other user - they should have the same "location" you do, have
them create a new mapset the same as the one you created, then they can unpack
(extract) the folder contents into the mapset location overwriting the
defaults. That should work...
Chris Bartolomei P.E.
Engineer/Scientist
ENSCO, Inc.
bartolomei.ch...@ensco.com
From: grass-user [grass-user-boun...@lists.osgeo.org] On Behalf Of Janet Choate
[jsc@gmail.com]
Sent: Wednesday, April 27, 2016 7:00 PM
To: grass list
Subject: [GRASS-user] Copy an existing location
Hello GRASS community,
Does anyone have advice on duplicating an existing GRASS location with only
certain rasters maps?
For example, I have an existing GRASS location with a PERMANENT mapset that
contains 100 maps. I want to create a copy of this existing location (with it's
current projection) to a new location, which will only contain 10 of the rater
maps from the existing location.
I want to be able to transfer a new 'cleaned-up' version of my GRASS location
to another user.
thank you,
Janet
The information contained in this email message is intended only for the use of
the individual(s) to whom it is addressed and may contain information that is
privileged and sensitive. If you are not the intended recipient, or otherwise
have received this communication in error, please notify the sender immediately
by email at the above referenced address and note that any further
dissemination, distribution or copying of this communication is strictly
prohibited.
The U.S. Export Control Laws regulate the export and re-export of technology
originating in the United States. This includes the electronic transmission of
information and software to foreign countries and to certain foreign nationals.
Recipient agrees to abide by these laws and their regulations -- including the
U.S. Department of Commerce Export Administration Regulations and the U.S.
Department of State International Traffic in Arms Regulations -- and not to
transfer, by electronic transmission or otherwise, any content derived from
this email to either a foreign national or a foreign destination in violation
of such laws.
___
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Copy an existing location
Hello GRASS community, Does anyone have advice on duplicating an existing GRASS location with only certain rasters maps? For example, I have an existing GRASS location with a PERMANENT mapset that contains 100 maps. I want to create a copy of this existing location (with it's current projection) to a new location, which will only contain 10 of the rater maps from the existing location. I want to be able to transfer a new 'cleaned-up' version of my GRASS location to another user. thank you, Janet ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
