<p dir="ltr">Hi Carlos,</p>
<p dir="ltr">Aha, this may be it. I've never fully understood all the Snapping options. And this is what might differ from my previous Adding Feature sessions which have always worked well. </p>
<p dir="ltr">I'll try your suggestions and report back . . . .</p>
<p dir="ltr">Cheers . . . . . Spring<br>
Samsung Tab 4</p>
<div class="gmail_quote">On Feb 3, 2016 7:51 AM, "Carlos Cerdán" <<a href="mailto:sig.upagu@gmail.com">sig.upagu@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>Hi Springfield:<br><br>I've had similar trouble some time ago, as a QGIS beginner user. Previous given advices are for not too-beginner users, but I think my experience can be useful for the list (or even for you?):<br><br>That time my error was my Snapping options: I had selected two or three layers and it was selected the "avoid intersections" option, then, when I added new digitized polygons, they were splitted or deleted (as you tell) because new polygons were intersecting marked layers in snapping options. It fixed when new digitizing shape was the one marked (of course to avoid intersections between her elements) .<br><br>Yes it was something simple, my foul. Is it not same trouble?. If so, Check it in "Configuration --> Snapping options --> Change the Self-assembling mode to "advanced" and be sure that "avoid intersections" is marked in your target layer only.<br><br></div>Cheers,<br><br></div>Carlos Cerdán<br></div><div class="gmail_extra"><br><div class="gmail_quote">2016-02-02 20:57 GMT-05:00 Springfield Harrison <span dir="ltr"><<a href="mailto:stellargps@gmail.com" target="_blank">stellargps@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
Hello Group,<br><br>
<u></u> <u></u>Am using
QGIS 2.10.1 and have done so without significant problems for many
months. I am attempting to create simple polygons in a shapefile by
direct vertex entry or copying polygons from another shapefile layer and
pasting them into the active layer.<br><br>
<u></u> <u></u>In almost
every case, these features disappear. There is an entity entry in
the attribute table but there are no polygons created. In one case
a polygon was created but it was not the shape that I digitized; no more
polygons could be created although the process for doing so appears to be
working. No error messages were created. The CRS for the
project and the shapefile are the same.<br><br>
<u></u> <u></u>The
shapefile can be opened in another GIS but has no content.<br>
<u></u> <u></u><br>
<u></u> <u></u>Here are
some product details: QGIS version 2.10.1-Pisa QGIS
code revision
<a href="https://github.com/qgis/QGIS/commit/d20c5b7" target="_blank">d20c5b7</a><br><br>
<u></u> <u></u>Thanks
very much for any help you can render, Cheers . . . . . . . . Springfield
Harrison<br>
</div>
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