<div dir="ltr">Those are great suggestions. I have put this on my to-do list, but given that I have a number of tasks already that I need to accomplish, it may be a few weeks before I will be able to work on it.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 8, 2021 at 12:56 PM chris hermansen <<a href="mailto:clhermansen@gmail.com">clhermansen@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr">Calvin and list,<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 8, 2021 at 6:35 AM C Hamilton <<a href="mailto:adenaculture@gmail.com" target="_blank">adenaculture@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">I should have jumped in on this conversation over the weekend especially since I am the author of Lat Lon Tools. but all who responded have properly addressed the problems with UTM and especially with how MGRS got mixed in with UTM and the confusion with N & S. What Lat Lon Tools provides is the standard UTM coordinates without the MGRS latitude bands. I have been considering adding another function that provides the alternative UTM with MGRS latitude bands.<div><br></div><div>If anyone has any suggestions on the best way to present these two different UTM versions that helps to avoid ambiguity, please let me know.</div><div></div></div><br></blockquote><div><br></div><div>A suggestion, yes. <br></div><div><br></div><div>This site <a href="https://www.maptools.com/tutorials/utm/quick_guide" target="_blank">https://www.maptools.com/tutorials/utm/quick_guide</a> doesn't make it completely obvious that they are talking about MGRS. Moreover it makes demonstrably false claims like</div><div><br></div><div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">The 10S is the Grid Zone Designation you are in. <u>The Grid Zone is necessary to make the coordinates unique over the entire globe</u>. (my emphasis here).<br></blockquote><p>This site <a href="https://www.spatialreference.org/ref/epsg/wgs-84-utm-zone-10s/" target="_blank">https://www.spatialreference.org/ref/epsg/wgs-84-utm-zone-10s/</a> makes the use of N and S as zones north of the equator and zones south of the equator completely clear, but doesn't mention MGRS.<br></p><p>Not to mention the Wikipedia article quoted awhile back in this conversation, which refers to both in an unclear fashion.<br></p><p>So my suggestion to you is that you make it clear that you are referring to UTM Zones as described by the <a href="http://spatialreference.org" target="_blank">spatialreference.org</a> site and not UTM Grid Zone Designations (or MGRS if you like) as described by <a href="http://maptools.com" target="_blank">maptools.com</a>. You may even want to be explicit in saying that there are only N and S designators in UTM Zones and they refer to metres north of the equator vs metres north of the -80th parallel.</p><p>You could call the version you have right now "UTM Zones" and the version you might develop "UTM Grid Zone Designations". Or maybe the latter as "UTM MGRS".<br></p></div></div><br clear="all"><br>-- <br><div dir="ltr"><div dir="ltr">Chris Hermansen · clhermansen "at" gmail "dot" com<br><br>C'est ma façon de parler.</div></div></div>
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