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The GDAL provider is a little special, in that it never reports errors.<br>
Instead it returns the default extent, as you have in your xml below.<br>
<br>
Sometimes (perhaps an MG bug or a specific format issue?), the default
extents are also<br>
returned for perfectly valid data, making it impossible to detect
errors :(.<br>
<br>
The only way to see the data, is to set up a map with the correct
coordinate system and<br>
extents. Then add the layer and preview the map.<br>
<br>
The GDALOPEN message you get means that the file was read correctly.<br>
I'm not sure what aux or HFA has to do with ECW though.<br>
IIRC (90% certain :)), it reports "succeeds as ECW" in my setup.<br>
<br>
The "Value cannot be null" could be the indicator, but since you can get<br>
the schema, I suspect that it is working anyway.<br>
<br>
In Maestro (the latest preview), there is a bug with the coordinate
system override,<br>
you need to use the "advanced" editor, or the coordsys override is not
set (there is an issue registered).<br>
<br>
<pre class="moz-signature" cols="72">Regards, Kenneth Skovhede, GEOGRAF A/S
</pre>
<br>
<br>
Denis Lalonde skrev:
<blockquote
cite="mid:62ec097b0912091358q6519fd68sb014817254b3ebdf@mail.gmail.com"
type="cite">
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><font
face="Calibri" size="3">I currently have several XP based laptops
running MGOS 2.02 (IIS, PHP) and one server (MGOS 1.2, IIS, PHP). All
of the maps on each were authored using Studio and each have a 1.05Gb
ECW displaying correctly.</font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><font size="3"><font
face="Calibri">However, I can not seem to get the same ECW to run
correctly with MGOS 2.1 on another new XP laptop (IIS, PHP). <span
style=""> </span>I’ve tried using both Studio 2009 as well as Maestro
to no avail.</font></font></p>
<div class="MsoNormal" style="margin: 0cm 0cm 10pt;"><font
face="Calibri" size="3">With studio, I use the GDAL provider and
connect to an external data source via a pre-configured alias
(C:\Data\ECW_2007). I then select the ECW via the “data files” and then
do a coordinate override. When I add the layer using this data source
and preview it, nothing appears.</font></div>
<div class="MsoNormal" style="margin: 0cm 0cm 10pt;"><font
face="Calibri" size="3">No errors show up in the log show up and
running in debug mode shows no errors. I only get messages of type:
“GDAL: GDALOPEN <C:\DATA\ECW_2007/Cornwall_10cm_20-1.aux,
this=0146110> succeeds as HFA” (I think that means no
errors...correct?).</font></div>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><font
face="Calibri" size="3">I’ve never used Maestro before, but I think I
do everything right there too. I select the GDAL Provider, of “type
Single file or folder”, point to my .ecw in the Aliased folder and
override the Coordinate System to UTM83-18.</font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><font
face="Calibri" size="3">When I create a layer for this datasource
however, I get this message:</font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri">“Failed to
read schema from data source.</font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri">The operation
gave the error message: Value cannot be null.</font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri">Parameter
name: <span style=""> </span>input”</font></font></span></i></p>
<div class="MsoNormal" style="margin: 0cm 0cm 10pt;"><font
face="Calibri" size="3">After that message shows up, I select
"default: default" in the Schema drop down and "Image" automatically
appears in the Raster drop down.</font></div>
<div class="MsoNormal" style="margin: 0cm 0cm 10pt;"><font
face="Calibri" size="3">If I check the XML of the datasource, the
extents shown don’t make any sense. <span style=""> </span>This is
apparent when I preview a map with the ECW because the map is centered
at 0X, 0Y. Why is that? (See XML below)</font></div>
<div class="MsoNormal" style="margin: 0cm 0cm 10pt;"><font
face="Calibri" size="3">I’ve tried repeating everything several times,
without success. I really need this to work. What has changed that this
doesn't work anymore?</font></div>
<div class="MsoNormal" style="margin: 0cm 0cm 10pt;"><font
face="Calibri" size="3">If anyone wants to test drive the ECW, I can
make it available for download. Let me know.</font></div>
<div class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><?xml
version="1.0"?></font></font></span></i></div>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><FdoSpatialContextList
xmlns:xsi="<a moz-do-not-send="true"
href="http://www.w3.org/2001/XMLSchema-instance">http://www.w3.org/2001/XMLSchema-instance</a>"
xmlns:xsd="<a moz-do-not-send="true"
href="http://www.w3.org/2001/XMLSchema">http://www.w3.org/2001/XMLSchema</a>"
xsi:noNamespaceSchemaLocation="FdoSpatialContextList-1.0.0.xsd"></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><span style="">
</span><ProviderName>OSGeo.Gdal.3.4</ProviderName></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><span style="">
</span><SpatialContext IsActive="true"></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><span style="">
</span><Name>Default</Name></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><span style="">
</span><Description>System generated default FDO Spatial
Context</Description></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><span style="">
</span><CoordinateSystemName>Default</CoordinateSystemName></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><span style="">
</span><CoordinateSystemWkt>LOCAL_CS["*XY-MT*",LOCAL_DATUM["*X-Y*",10000],UNIT["Meter",
1],AXIS["X",EAST],AXIS["Y",NORTH]]</CoordinateSystemWkt></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><span style="">
</span><ExtentType>Static</ExtentType></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><span style="">
</span><Extent></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><span style="">
</span><LowerLeftCoordinate></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><span style="">
</span><X>-10000000</X></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><span style="">
</span><Y>-10000000</Y></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><span style="">
</span><span style=""> </span></LowerLeftCoordinate></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><span style="">
</span><UpperRightCoordinate></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><font size="3"><font
face="Calibri"><i style=""><span style="color: red;"><span style="">
</span></span></i><i style=""><span style="color: red;" lang="FR-CA"><X>10000000</X></span></i></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;" lang="FR-CA"><font size="3"><font face="Calibri"><span
style=""> </span><Y>10000000</Y></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;" lang="FR-CA"><font size="3"><font face="Calibri"><span
style=""> </span></UpperRightCoordinate></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;" lang="FR-CA"><font size="3"><font face="Calibri"><span
style=""> </span></Extent></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;" lang="FR-CA"><font size="3"><font face="Calibri"><span
style=""> </span><XYTolerance>0.001</XYTolerance></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><font
size="3"><font face="Calibri"><span style="color: red;" lang="FR-CA"><span
style=""> </span></span><span style="color: red;"><ZTolerance>0.001</ZTolerance></span></font></font></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"><span style="">
</span></SpatialContext></font></font></span></i></p>
<p class="MsoNormal" style="margin: 0cm 0cm 10pt;"><i style=""><span
style="color: red;"><font size="3"><font face="Calibri"></FdoSpatialContextList></font></font></span></i></p>
<pre wrap="">
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</pre>
</blockquote>
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