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--></style></head><body lang="EN-US" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">The reason the compressed objects were depricated is because there were about ten thousand APRS radios (D700’s) out there that could not decode them. (Problem is, I lost my notes on what does and does not work… argh!)</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">But, if the idea is to have consistent performance and end-to-end communication in a tactical real-time network, it did not seem to be a good idea to have a built-in, known failure mode in a standard.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Also, the compressed format has no more precision than a regular object. Its still to the nearest 60 feet. Only the !DAO! protocol has increased precision.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">If anyone has the exact list of what the D700’s or any other radio for that matter, do or do not decode, then maybe it is time to re-look at this.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Bob, WB4APR</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> aprssig [mailto:<a href="mailto:aprssig-bounces@tapr.org">aprssig-bounces@tapr.org</a>] <b>On Behalf Of </b>Curt Mills via aprssig<br><b>Subject:</b> [aprssig] APRS SPEC Addendum 1.2 Proposals</span></p><p class="MsoNormal"> </p><div><div><div><div><div><p class="MsoNormal" style="margin-bottom:12.0pt">Regarding this web page:<span style="color:#1f497d"> </span> <a href="http://www.aprs.org/aprs12.html">http://www.aprs.org/aprs12.html</a><br>"Formats no longer recommended: Compressed-Objects, ITEM Format, Raw Weather Formats,"<span style="color:#1f497d"></span></p></div></div><p class="MsoNormal" style="margin-bottom:12.0pt">I'd like to put in my thumbs-up for both Compressed Objects, and both Compressed and Non-compressed Items.</p></div><p class="MsoNormal" style="margin-bottom:12.0pt">We've implemented these in Xastir and I find them of use in SAR. Compressed format gives much better precision in placing and/or recovering objects, precision you cannot get with non-compressed APRS formats. Items are useful for placing positions when you have no timestamp, as well as providing a shorter packet than APRS Object format.</p></div><p class="MsoNormal">In short, I see no advantage to removing formats that are currently used to good effect and already implemented in APRS programs.<br clear="all"><br>-- <span style="color:#1f497d"></span></p><div><div><div><div><div><div><p class="MsoNormal">Curt, WE7U<br><a href="http://wetnet.net/~we7u" target="_blank">http://wetnet.net/~we7u</a><br><a href="http://www.sarguydigital.com" target="_blank">http://www.sarguydigital.com</a></p></div></div></div></div></div></div></div></div></body></html>