Armando,
Thanks Again for the very helpful hint! I determined that if i edit the ECW in the Maptitude directory and add the following parameters to the NUTM projections, the images are handled properly: a=6378137 ellps=GRS80 Philip, can you confirm that this is the major axis and ellipsoid i should be using for all of the NUTM zones? If so, i think i am in good shape. Armando, you saved the day! Also, kudos to Caliper for setting up this user group! I am, now, a true believer! Michael --- In [email protected], Armando Scalise <[EMAIL PROTECTED]> wrote: > Mike. > > Just a blind shot: > > Take a look at the ECW file in the maptitude directory. > > <NUTM01> is the only projection that has there has a deifinition for > the a parameter (eliipsoid main axis ). All other <NUTMxx> definitions > lack a value for a. Try adding a=6378206.4 to the NUTM19 and see if the > > "Major Axis or Radius = ..." message goes away and if you have any furthr improvement when viewing the images. > > Good luck > > Armando > > > > > > > mekesse wrote: > > >We have a customer who has purchased an extensive library of aerial > >imagery that is in ECW format. According to the Maptitude help > >system, ECW format is supported. There is mention of an > >associated .ERS file that contains the header information. > > > >These aerial photos do not have .ERS files. rather, the header > >information is built into the file. I confirmed this using a free > >utility from ER Mapper. > > > >Ok, here is the problem. > > > >I can open the aerial photo in Maptitude and can successfully add new > >layers to the map. However, if i try to add an aerial photo to an > >existing map (the most common use case), the aerial photo will not > >appear. It shows up in the layer list, but does not display on the > >map. I have tried turning off every layer except the photo and it > >doesn't show up. > > > >The only way i have been able to get this to work was by doing the > >following: > > > >1. Opening the image in the ER Mapper header editor to determine the > >projection (or using the GISDK to query the projection). For the > >images i was testing, the projection was listed as "NUTM19." I > >assumed that this meant "Universal Transverse Mercator" in "Zone 19." > > > >2. I explicitly set the projection for the map to be "UTM 19" and > >then attempted to add the aerial image. This worked successfully. > > > >The problem i am having is that this customer is concerned that the > >workflow is too cumbersome (i.e. having to open the image in another > >program to determine the projection first and then having to set that > >projection for the map). They are recent MapInfo converts, which > >handled these image formats natively. > > > >According to the documentation, Maptitude is supposed to > >automatically lock the projection of the map to be the same as the > >projection for the image that has been added. This would be fine. I > >have confirmed that this works properly with other imagery formats > >(i.e. TIFF and Mr.Sid). However, ECW seems not to work. > > > >Is there something that can be done here? I was thinking that the > >header file may be listing the projection using a code that Maptitude > >doesn't understand. I would be willing to help the customer update > >the headers, if this will work. However, i need to know what to > >update it to. > > > >Another nugget of information: Whenever i add an ECW file to the > >map, i receive the following error message: > > > >"Major Axis or Radius = 0 not given. Click OK to continue. > >Reference Info, lay_map,1070,0." > > > >Any help would be greatly appreciated! > > > >Thanks. > > > >Michael > > > > > > > > > > > > > > > >Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > > > > > ------------------------ Yahoo! Groups Sponsor --------------------~--> Has someone you know been affected by illness or disease? Network for Good is THE place to support health awareness efforts! http://us.click.yahoo.com/RzSHvD/UOnJAA/79vVAA/C5grlB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Maptitude/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
