MartyConnelly
martyconnelly at shaw.ca
Wed Sep 17 00:16:57 CDT 2003
The rough rule of thumb for speed and cost that I have heard is Access below 500MB, MS-SQL up to 5TB, Oracle or DB2 up to 20-30TB and some specialized databases after that. I would be heading for the hills after the first TeraByte. Yup they do get this size easily, raster vs vector storage is 10:1 I have heard of one radio astronomy VLBI group in Europe that road or air freights their Terabyte tapes. The internet is too slow. They grab data at the rate of 1 Gigabyte per second per telescope and they have 16 of them. http://news.bbc.co.uk/1/hi/technology/3093294.stm Generally the vectors or raster info is stored in a Blob type field and handled by a secondary proprietary database engine sitting on top of the primary database. ESRI calls it an SDE (Spatial Datbase Engine). These work via R* trees or Quad Tree indexes. Charlotte Foust wrote: >I thought Oracle was the RDBMS of choice for ESRI. > >Charlotte Foust > >-----Original Message----- >From: John B. [mailto:john at winhaven.net] >Sent: Tuesday, September 16, 2003 5:18 AM >To: Access Developers discussion and problem solving >Subject: RE: [AccessD] OT: Today's GIS > > >:o) > >Yes, when they made the move to Arc8, which basically wants you to use a >RDBMS for data storage rather than the "Info" flat file system used >previously, most of the users rebelled. I would estimate that in >Wisconsin (ArcInfo is the State mandated standard) that no one moved to >using a RDBMS for over a yer and we're probably up to about 20% doing >it. Hard to change almost 20 years of engrained habit. > >The really nice thing is that the ESRI line VBA capable and they are >promoting the use of VBA instead of their own Macro languages. > >BTW for those of you who don't know what GIS is - it's Geographic >Information System. Basically smart maps (and other graphics). Very >powerful environments that allow one to connect intelligent graphics >elements to information attributes that can be entered, edited and >recalled via the graphics (and via queries). These graphic elements >"know" about themselves and where they fit in the world. Queries can be >attribute queries, spatial queries or a combination of both. On this >list we all know attribute queries. A spatial query would be something >Show me all of the residential areas that are adjacent to a water >feature. A combination query would be one that uses the graphics >elements and attribute information that has no graphic element such as >"phone number". One such as Marty described, in laymen's terms: "let me >see all of the residential units that have changed phone service within >the last year". Cool stuff. > > > >>-----Original Message----- >>From: accessd-bounces at databaseadvisors.com >>[mailto:accessd-bounces at databaseadvisors.com]On Behalf Of Haslett, >>Andrew >>Sent: Tuesday, September 16, 2003 2:14 AM >>To: 'Access Developers discussion and problem solving' >>Subject: RE: [AccessD] OT: Today's GIS >> >> >>Lets hope ESRI get everything working properly in their latest >>releases. >>;=) >> >>-----Original Message----- >>From: Jim Lawrence (AccessD) [mailto:accessd at shaw.ca] >>Sent: Tuesday, 16 September 2003 4:07 PM >>To: Access Developers discussion and problem solving >>Subject: RE: [AccessD] Today's GIS (was Info: Free Windows Fortran 77 >>Compiler) >> >> >>There has been some major chances in GIS capabilities over the last >>twenty years. The new state art is ARCInfo. It is a full object >>oriented data and graphic package with an extensive set of tools that >>can link it into virtually any data sources and combine them >>together. It is fully programmable as well. Some pretty heady stuff. >>As you have observed, the GIS packages are much more than just a CAD >>program. >> >>I may eventually start working in GIS, again...one of these days...an >>old friend is now incharge of the local government services and has >>extended an offer. >> >>Still debating. >> >>Jim >> >>-----Original Message----- >>From: accessd-bounces at databaseadvisors.com >>[mailto:accessd-bounces at databaseadvisors.com]On Behalf Of >>MartyConnelly >>Sent: Monday, September 15, 2003 7:58 PM >>To: Access Developers discussion and problem solving >>Subject: Re: [AccessD] Today's GIS (was Info: Free Windows Fortran 77 >>Compiler) >> >> >>I took a GIS course, a couple of years back at U Vic to keep my hand >>in. It was all Unix MapSys. I am still surprised how many people >>don't think out of the box with GIS. I once had to find out how many >>people had moved in a year in a municipality surrounded by Ottawa. So >> >> > > > >>I did it with address matching and maps showing the actual moves; took >> >> > > > >>about a month to do. I came up with a figure of 30%. The urban >>planners started berating me about the figure being way too high. >> So I showed them the figures I got from Bell Canada. The number of >> >> >new > > >>residential phone connects in the year was 33% in that municipality. >> >> >At > > >>that time there were no cell phones. >>One phone call to Bell could have given them a ball park figure rather >>than using GIS. >> >>John B. wrote: >> >> >> >>>If you haven't worked in GIS for awhile I think you'de be pleasantly >>>surprised how far they've come. >>> >>>I was a GIS Project Manager in the late 90's just as Intergraph >>> >>> >>made a huge >> >> >>>switch in philosphy. They adapted Windows NT as their OS of choice >>>and jumped from Unix to NT, Eventually, after they migrated their >>>customer >>> >>> >>base, >> >> >>>they got out of the Unix OS(Clipper) business all together, although >>>they >>> >>> >>do >> >> >>>support using other OS based DBs via networks. >>> >>>There are basically two main companies involved in GIS now, >>>Intergraph (which is publicly held) and ESRI (which is privately >>>owned). Intergraph >>> >>> >>has >> >> >>>a lot of other companies using their technologies to target specfic >>>tasks/audiences. ESRI has a lot of companies writing add-ons or >>> >>> >>supplements >> >> >>>to their software. >>> >>>It's an amazing set of technologies! >>> >>> >>> >>> >>> >>>>-----Original Message----- >>>>From: accessd-bounces at databaseadvisors.com >>>>[mailto:accessd-bounces at databaseadvisors.com]On Behalf Of >>>>MartyConnelly >>>>Sent: Sunday, September 14, 2003 10:02 PM >>>>To: Access Developers discussion and problem solving >>>>Subject: Re: [AccessD] Info: Free Windows Fortran 77 Compiler >>>> >>>> >>>>Cadastral from french cadastre meaning to register. Hence a Land >>>>registry system. >>>> >>>>However don't go near the Quebec Land Registry based on old >>>>Seigneurial land titles everything was measured in perches or some >>>>other obscure 17'th century measurement. >>>> >>>>Yup I worked on two GIS cadastral mapping systems linked to land >>>>assessment databases one in Ottawa with a Honeywell 6000 GCOS >>>>mainframe and one PDP 11/70 Intergraph system in Calgary. >>>> >>>>Gustav Brock wrote: >>>> >>>> >>>> >>>> >>>> >>>>>Hi Jim >>>>> >>>>>Sounds impressive. But cadastral? Even my trusted "American >>>>>Heritage Dictionary" (bought in Olympia 1986 for USD 4.95) had to >>>>>give up on this. Google, however, revealed this page among others: >>>>> >>>>>http://www.co.blm.gov/cadastral/cadhome.htm >>>>> >>>>>Is that what your project was about? >>>>> >>>>>/gustav >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>>>Wow, that dates things...I was pretty decent Fortran programmer >>>>>> >>>>>> >>>>>> >>>>>> >>>>back in the >>>> >>>> >>>> >>>> >>>>>>late seventies, early eighties...I build a complete cadastral >>>>>>AutoCAD application that translated coordinates from Clarke's 1886 >>>>>> >>>>>> >>>>>> >>>>>> >>>>global positional >>>> >>>> >>>> >>>> >>>>>>formula spheroid to conic and mecaider map projections, on an >>>>>> >>>>>> >>Intergraph >> >> >>>>>>system, running on an old PDP11-70 VAX. I was a lot brighter then >>>>>>and remember little about it except that one period missing in a >>>>>> >>>>>> >>>>>> >>>>>> >>>>the code could >>>> >>>> >>>> >>>> >>>>>>result in 100 plus pages of errors. I hope they have improved >>>>>> >>>>>> >>the error >> >> >>>>>>handling routines. >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> >>>>>>Thanks for the heads up Marty and maybe I will take a stroll >>>>>> >>>>>> >>down memory >> >> >>>>>>lane. (Even though it is a bit over-grown.) >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> >>>>>>Jim >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> >>>>>>-----Original Message----- >>>>>>From: accessd-bounces at databaseadvisors.com >>>>>>[mailto:accessd-bounces at databaseadvisors.com]On Behalf Of >>>>>> >>>>>> >>MartyConnelly >> >> >>>>>>Sent: Saturday, September 13, 2003 5:09 PM >>>>>>To: Access Developers discussion and problem solving >>>>>>Subject: [AccessD] Info: Free Windows Fortran 77 Compiler >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> >>>>> >>>>>>I was looking at the Fortran95.Net compiler on this site when I >>>>>>came across this free for personal use Fortran 77 compiler. a bit >>>>>>dated but... Still useable with some of the good stat-math packs >>>>>>that are floating around on the net. >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> >>>>>>http://www.salfordsoftware.co.uk/compilers/ftn77pe/index.shtml >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>_______________________________________________ >>>>>AccessD mailing list >>>>>AccessD at databaseadvisors.com >>>>>http://databaseadvisors.com/mailman/listinfo/accessd >>>>>Website: http://www.databaseadvisors.com >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>_______________________________________________ >>>>AccessD mailing list >>>>AccessD at databaseadvisors.com >>>>http://databaseadvisors.com/mailman/listinfo/accessd >>>>Website: http://www.databaseadvisors.com >>>> >>>> >>>> >>>> >>>> >>>> >>>_______________________________________________ >>>AccessD mailing list >>>AccessD at databaseadvisors.com >>>http://databaseadvisors.com/mailman/listinfo/accessd >>>Website: http://www.databaseadvisors.com >>> >>> >>> >>> >>> >>_______________________________________________ >>AccessD mailing list >>AccessD at databaseadvisors.com >>http://databaseadvisors.com/mailman/listinfo/accessd >>Website: http://www.databaseadvisors.com >> >>_______________________________________________ >>AccessD mailing list >>AccessD at databaseadvisors.com >>http://databaseadvisors.com/mailman/listinfo/accessd >>Website: http://www.databaseadvisors.com >> >>IMPORTANT - PLEASE READ ******************** >>This email and any files transmitted with it are confidential and may >>contain information protected by law from disclosure. 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