It seems to me that the disturbing thing is the difference of 2.5 for Pt1 between the two lots of output quoted. Is this a "centre of pixel" vs "top left of pixel" difference? If so, what versions of the software are you using? And, has it been corrected in the latest (MI 7.8 / 8.0 / +) and VM?
Ian Thomas GeoSciSoft - Perth, Australia -----Original Message----- From: Campbell, Keith A [mailto:[EMAIL PROTECTED] Sent: Thursday, 7 April 2005 9:38 PM To: 'MapInfo-L@lists.directionsmag.com' Subject: RE: MI-L SUM: ESRI Grid Files Well, I'm certainly no expert on grid files formats, but MI will not open the ASCII file format exported by ArcGIS. Grid Tools will not convert it either, but Vertical Mapper will import it, and I think export it (ASCII grid export (.txt). However, I do retract my statement about VM .grd files - MI will open these. I think my confusion here was caused by the fact that I had imported an ASCII grid with VM and it saved it in GRD format. I was then puzzled to find that the MapInfo 3DMap option was not available for this file type. So I exported it to .mig with VM and opened that in MI - the 3D option was then available. However, I have tried opening the .grd file through the MI Open dialog since your post and it overwrites the tab file; the 3d Map option is then available. So I conclude that the metadata in the tab file created by VM is different to that created by MI and this prevents the 3D option from being available in the menu. The tab contents are reproduced below to demonstrate the difference. VM (3.1) produced:- !table !Version 300 !charset WindowsLatin1 Definition Table File "afxyzs5o_.grd" Type "RASTER" (499000.000000,152000.000000) (0,0) Label "Pt 1", (503995.000000,147005.000000) (999,999) Label "Pt 2", (499000.000000,147005.000000) (0,999) Label "Pt 3" CoordSys Earth Projection 8, 79,"m", -2,49,0.9996012717,400000,-100000 UNITS "m" ReadOnly begin_metadata "\Vm\Grid" = "Numeric" "\IsReadOnly" = "FALSE" end_metadata MI 7.5 produced:- !table !version 500 !charset WindowsLatin1 Definition Table File "afxyzs5o.grd" Type "RASTER" (499002.5,151997.5) (0,0) Label "Pt 1", (503997.5,151997.5) (1000,0) Label "Pt 2", (503997.5,147002.5) (1000,1000) Label "Pt 3", (499002.5,147002.5) (0,1000) Label "Pt 4" CoordSys Earth Projection 8, 79, "m", -2, 49, 0.9996012717, 400000, -100000 Units "m" RasterStyle 6 1 Seems to be the ' RasterStyle 6 1' line that makes the difference - if this manually added to the VM produced tab file, the 3D Map option is available! Good news about tighter integration between VM and MI and also ESRI grids in MI 8.0! Regards, Keith -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 07 April 2005 13:47 To: Campbell, Keith A Subject: Re: MI-L SUM: ESRI Grid Files Sorry, I'm not sure I understand here. MI Pro can open ASCII DEM files, GTOPO30, and DTED level 0, 1, and 2 grid files either directly from File>Open >Files of type: Grid, as well as using the GridTools.MBX which you can use to convert them to MIG format. This has existed since v6.5 at least. Perhaps the structure of these ASCII files does not follow the USGS ASCII DEM convention, but one of ESRI's? MI Pro has also had a Vertical Mapper raster handler shipping with it for last several years or so, that allows you to open VM *.grd & *.grc format grids directly. Northwood, then Marconi, supplied this grid\raster handler off their website for a couple years even before it was incorporated into MI Pro itself. Are the *.GRD files you're trying to open actually VM grids, or are they a different format using same extension? There are several out there that share the same extension as VM. MapInfo now owns the source code and development rights to VM, so in future releases this integration will be even tighter too. The only thing we don't currently support are ESRI grid format files and if you want to know a little secret, as of MI 8.0, that will be a thing of the past too. Kind Regards, -Bill Mail List: [EMAIL PROTECTED] From: on 04/07/2005 09:50 AM CET To: "'MapInfo-L@lists.directionsmag.com'" <MapInfo-L@lists.directionsmag.com> cc: Subject: MI-L SUM: ESRI Grid Files I've had a couple of enquiries about this, so thought I'd better sum the results. The question was how to get ESRI grid files into MapInfo. MI will not read ESRI grid files, nor other file formats such as ASCII text that ArcGIS can export, so another product is required. Vertical Mapper can import ASCII (and export MIG if need be). It's interesting that MI will not read the Vertical Mapper GRD format. To go straight from ESRI grid into Vertical Mapper (not MI) another add-on such as Grid Translator Pro ; http://www.geomaticssystems.com/Products/GTPMapInfo.htm <http://www.geomaticssystems.com/Products/GTPMapInfo.htm> is required (thanks to Ihab Hawater for that one). Jaromir Svasta suggested that Grid Analyzer: http://www.terris.sk/ga.php <http://www.terris.sk/ga.php> is a good alternative to Vertical Mapper. Regards, Keith This email and any attached files are confidential and copyright protected. If you are not the addressee, any dissemination of this communication is strictly prohibited. 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