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<DIV><FONT color=#000000>Hi</FONT></DIV>
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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="COLOR: "><FONT
color=#000000>I am a member of </FONT><A
title="the Society for One-Place Studies"
href="http://one-place-studies.org/">the Society for One-Place Studies</A><FONT
color=#000000>, “where family history and local history unite”.
</FONT></SPAN><SPAN style="COLOR: "><FONT color=#000000>I have been exploring
how we might support people doing One-Place Studies (OPS) to use mapping. To
this end I have developed </FONT><A
style='href: "http://mapping4ops.org/"'><FONT color=#000000>a
forum</FONT></A><FONT color=#000000> (<A title=https://www.mapping4ops.org/
href="https://www.mapping4ops.org/">mapping4ops.org</A>) where ideas,
experiences, documentation etc can be be logged, and a prototype mapping system
</FONT><A
style='href: "http://mapping4ops.org/ShowMaps/M4OPS-index.html?Splash=Default"'><FONT
color=#000000>M4OPS</FONT></A><FONT color=#000000> (Mapping for One-Place
Studies - <A
href="https://www.mapping4ops.org/M4OPS?Splash=Default">mapping4ops.org/M4OPS</A>)
. On M4OPS we have a number of studies, each with both current and historic maps
that we can layer over each, together with features from data that our
researches uncover. </FONT></SPAN><SPAN style="COLOR: "><FONT
color=#000000>Technically M4OPS use OpenLayers4, and we are able to cope with
inputs from lots of different sources, and in different formats, as well as
create our own. </FONT></SPAN></P></DIV>
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style="COLOR: "></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="COLOR: ">Knowing we
have similar but different aims, when I started out I did try reaching out to
the OHM mailing list, and had a few responses. I have not seen many posts on the
OHM mailing list until recently, so I was not sure how active the group
are.</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
style="COLOR: "></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="COLOR: ">While I am
always happy to talk generally about mapping and local history, in the current
discussion I thought I would mention what I have tried out for time sliders in
case it is of interest. You can see an example in the <A
href="https://www.mapping4ops.org/ShowMaps/M4OPS-index.html?&OPS=HcN&Showlevel=8600">last
section of my demo system</A> (click on Next for more explanation).</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
style="COLOR: "></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="COLOR: ">Because I
come from the genealogical world I personally use GEDCOM* style dates (1924, MAR
1876, BEF, AFT, FROM, ABT etc) in my databases (eg for people, events,
buildings, relationships). Although not perfect, and initially hard to program
for, these do give all the flexibility I need. A few of us on the forum have
discussed some of the issues (eg <A
href="https://www.mapping4ops.org/other-aspects-of-mapping-of-one-place-studies/linking-data-from-different-maps-across-time/">here</A>),
but I cannot pretend to have solved them yet. I have not yet enabled our time
slider to cope with all the flexibility of GEDCOM dates.</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
style="COLOR: "></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="COLOR: ">Peter
Cooper</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
style="COLOR: "></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="COLOR: ">* For
anyone not familiar with GEDCOM the current version (v5.5) is from the 1990's,
is far from perfect, and is very widely used. For various reasons (eg RootsWeb
being unavailable) the specification is a bit difficult to work with at present.
One description is <A
href="https://tng.lythgoes.net/wiki/index.php/GEDCOM#Dates">here</A>, and the
(very comprehensive) GEDCOM X proposal is <A
title=https://github.com/FamilySearch/gedcomx/blob/master/specifications/date-format-specification.md
href="https://github.com/FamilySearch/gedcomx/blob/master/specifications/date-format-specification.md">here</A>..</SPAN></P></DIV>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
style="COLOR: "></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="COLOR: "></SPAN>
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<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A
title=bilbo.beuthel@gmail.com>PauLL170</A> </DIV>
<DIV><B>Sent:</B> Sunday, May 6, 2018 11:19 AM</DIV>
<DIV><B>To:</B> <A title=jeff@gwhat.org>Jeff Meyer</A> </DIV>
<DIV><B>Cc:</B> <A
title=historic@openstreetmap.org>historic@openstreetmap.org</A> ; <A
title=jmasur@bluewin.ch>Jonathan Masur</A> </DIV>
<DIV><B>Subject:</B> Re: [OHM] Open Historical map</DIV></DIV></DIV>
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<DIV>Hi,<BR><BR></DIV>i'm already mapping Germersheim and a bit of Trier :) .
Regarding start_date and end_date I was talking about the following: E. g. if
you have a photo from 1983-05-01 with a certain building and one from 1980-07-01
without it, you can set as start_date 1980-07-01..1983-05-01. In my opinion it
is important that the time slider recognizes this form, because it is often the
case. Generally, we will have to think about how to render this object in this
period, in which the building possibly already have existed. But for now, I just
want to suggest that the time slider recognizes this form in general, as far as
it is doable. As a first version I imagine a check box: "show doubtful objects".
If it is activiated, the "start_date" technically is set 1980-07-01 and if not,
it is set 1983-05-01.<BR><BR></DIV>Best regards<BR>Paul<BR></DIV>
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