I don't know all the reasons for Access Geodatabases but here is what I
do know.
When ArcINFO started turning into the desktop product there was a move
to get things into a "database". ESRI had used INFO/Coverages for years.
I think the quickest way to get to that end was Access. You could fold
all your vector data into Access. It is slow from ArcGIS. You can't
store raster. It has the habit of becoming very large very quickly and
imploding. I think somewhere between 500Mb and 2 Gb were the problem
sizes. They introduced file based geodatabases which aren't databases
and aren't file based - they are directories and in my opinion are
coverages Part II. File based databases are stable and much easier to
work with - and too proprietary for my tastes now. You can get the data
out but it isn't easy.
Randy
Randal Hale, GISP
North River Geographic Systems, Inc
http://www.northrivergeographic.com
423.653.3611 [email protected]
twitter:rjhale
http://about.me/rjhale
On 9/22/2012 9:10 AM, Johan Nilsson wrote:
Fist. I know very little about using dedicated realationdatabase in
GIS. I not sure about why ESRI support mdb then they quiet strongly
recommend you NOT to use it.
http://webhelp.esri.com/arcgisdesktop/9.2/index.cfm?topicname=types_of_geodatabases
I think to hold files in a directory (folder) are a very sheep price
compared to slow performance limited storage to max 2 GB.
Does anyone know if there may be other problems with MS Access files?
Missed seached data and so on?
Cheers
2012/9/22 Andre Joost <[email protected]
<mailto:[email protected]>>
Am 22.09.2012 09:43, schrieb Johan Nilsson:
Okey. I'm new to database use i GIS and have only used file
database that
ESRI recommend. But if mdb are a propretarian and only work
well with MS
access, how can it then be highly portable?
I thought of "portable" in the sense of taking a database from one
computer to another. MDB and sqlite are just one file, Shapefile
a couple of files, and PostgreSQL/Postgis is very complicated to
share/take with you or make a security copy.
Greetings,
André Joost
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