<div dir="ltr"><div><div>Hello all,<br><br></div>We are trying to achieve optimal tile
size for WMTS streaming based on a all-PNG TMS source. For that we
turned to mixed cache format, however it seems the size of each .mixed
tile in cache is still 150-180kb, and IrfanView reads them as PNG type -
although they are not at the edge of the dataset, so should technically
become JPEGs and be 20-30kb..<br><br></div>We also have other TMS
sources that are stored in JPEG+PNG format, and when mixed cache format
is applied to that source - we can definitely take advantage of the
underlying JPEG tile sources and decrease the size of streamed WMTS
tiles. IrfanView also reads those streamed tiles as JPEG type as
expected. All good in this case.<br clear="all"><div><br></div><div>By
the way, before we enabled mixed cache format for the mixed tile source
- cache tiles were streamed as PNGs and of PNG level size (150-200kb).
So it seems, MapProxy did convert our JPEG source tiles into PNG cache
tiles. Now, coming back to the first paragraph, my question is - would
it convert my source PNG tiles into JPEG-type cache tiles of mixed
format? Or would we ultimately need to re-tile our data into JPEG+PNG
TMS source to be able to actually take advantage of smaller tile sizes
of mixed cache format for streaming? <br><br></div><div>I wonder if I am doing something wrong or this is how MapProxy works? <br></div><div><br>Here is a sample of our cache config (first one produces needed results, second one not):<br>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal"><span><br></span></p><p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal"><span> </span>MixedSource_cache:</p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal"><span> </span>grids: [webmercator]</p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal"><span> </span>sources:
[<span></span>MixedSource_p_tms, <span></span>MixedSource_j_tms]</p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal"><span> </span>format: mixed</p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal"><span> </span>request_format: image/png</p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal"><span> PNGSource</span>_cache:</p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal"><span> </span>grids: [webmercator]</p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal"><span> </span>sources:
[<span>PNGSource</span>_p_tms]</p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal"><span> </span>format: mixed</p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal"><span> </span>request_format: image/png</p>
<br></div>Thanks in advance!<br clear="all"><br>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><b><span style="font-size:12pt;line-height:115%;font-family:Arial,sans-serif;color:rgb(0,40,168)">Anna Pestereva, GISP</span><span style="font-size:12pt;line-height:115%;font-family:Arial,sans-serif"> | <i><span>Application Developer & Cartographer</span></i></span></b><span style="line-height:115%;font-size:12pt;font-family:Arial,sans-serif"><br>
</span><b><span style="font-size:12pt;line-height:115%;font-family:Arial,sans-serif;color:gray">Aerial Services, Inc.
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