> Date: Wed, 16 Jan 2013 23:05:23 +0800 > From: Ramon Andi?ach <[email protected]> > To: qgis-developer <[email protected]> > Subject: Re: [Qgis-developer] QGIS 1.8 Windows Standalone is not OK > with spatialite versions (ECW tangent) > Message-ID: <[email protected]> > Content-Type: text/plain; charset=windows-1252 > > > On 16/01/2013, at 15:23 , Ted wrote: > > > just minor correction in your letter, Chris is "Product" manager for ECW > > Noted. I'll fix that before sending it off. > > > > Just as I note, they have Read Only version of the SDK and also have few > > other editions; > > > > ERDAS ECW/JP2 SDK is offered as four different editions: > > > > ? ERDAS ECW/JP2 SDK Server Read-Write provides tools to enable server > > applications to read ECW, ECWP, and JPEG2000 data, serve ECW and JPEG2000 > > data, and compress images into the ECW and JPEG2000 data formats. > > ? ERDAS ECW/JP2 SDK Server Read-Only provides tools to enable > > end-user server applications to read ECW, ECWP and JPEG2000 data and serve > > ECW and JPEG2000 data via third-party server applications. For ESRI ArcGIS > > Server customers, please refer to ECW for ArcGIS Server. > > ? ERDAS ECW/JP2 SDK Desktop Read-Write provides tools to enable > > desktop applications to read ECW, ECWP and JPEG2000 and compress images > > into ECW and JPEG2000 data formats. > > ? ERDAS ECW/JP2 SDK Desktop Read-Only is a free product that provides > > tools to enable desktop applications to read ECW, ECWP and JPEG2000. > > > > Since this is a major shift from the 3.3 SDK which allowed WRITE function > > upto 500MB, we could use without much of a problem. After hexagon, there > > has been lot of changes and also the licensing of SDK. > > > > At the moment, for GDAL and well and general QGIS user, what we are looking > > at is, DESKTOP READ ONLY SDK where by users could use ECW files in QGIS. > > > > So, we need to be very specif about this. > > > > They will never allow GDAL or anyone else to use the library for ECW > > Serving function, without $$$$$. So, dont even bother to ask. > See notes below. > > > So, with GDAL, we should make a point to mark ECW as Read only format. > No. Currently that is only the situation for *windows* users, as everyone > else is still using the 3.3 SDK, which as you note allows writing.
Of course, on Windows gdal ecw can be used for a server or with write support if you do want to spend the money. > 1. I thought it was reasonably clear that I was talking about the Desktop > Read-Only SDK. If it's not, please say so. > I haven't made reference to any other of the licences in the explanation or > the questions. > > 2. If I understand from Paolo and previously J?rgen, the really big sticking > point is that it is possible to install a QGIS server on a GDAL with the > desktop SDK plugged in. Depending on who's responsible for the correct use of > the SDK defines the ease of which the ECW-plugin can be put back into > service. So the clarifying questions 3 and 4 are in that sense the important > ones. > > If the responsible party is people like me (the user end) then a big fat > warning as you suggest will probably do. Have to see what they say. > If the responsible party is the developer end, then the problem is *much* > more difficult, as there would need to be ways built in to make sure that the > desktop only part was *not* contravened. (As a User I can see this is > complicated. Money may help, but it's also an ethical thing too.) > > 3. In light of the above I felt that the explanation leading into the > questions was important to give a sense of where the questions were coming > from. > > Questions 1 and 2, we probably know the answers to, but it would be good to > see if we can get straight answers on them. > Questions 3 and 4 are the important ones. > Questions 5 and 6 are requests for information.[1] > > 5. I've not even asked about the requirement to support both ECW and ECWP... > This is pretty much a secondary hurdle to me. Note that GDAL does support ECWP, so I think even if the QGIS gui does not provide a way to load it, that should be possible from the Python console or using a GDAL "service description" XML file or a .vrt file. But I haven't tested as I've never come across ecwp in the wild... > 6. I'm was about to head for bed so apologies if this is not as sensible as > I'd like. I thought having my thoughts (such as they are) out while most > others are awake would be worth it. > > -ramon. > [1] Current version (with revisions based on Alister's earlier comments) is > now here: > https://www.dropbox.com/s/b5wclxeheeh4act/QuestionsForIntergraph2012i16 _______________________________________________ Qgis-developer mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-developer
