Hi Lucas, it is a raster file and thanks for the detailed instructions, I will give it a go one I get back to the office.<div>Thanks again,</div><div>- Mike<br> <br><div class="bloop_sign"><div>-- <br>Imagine Aerial</div></div> <p class="gmail_quote" style="color:#000;">On July 3, 2017 at 8:32:52 AM, Lukas Winiwarter [via OSGeo.org] (<a href="/user/SendEmail.jtp?type=node&node=5326535&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>) wrote:</p> <blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' type="cite" class="gmail_quote"><span><div><div></div><div>
<title></title>
<p>Hi Mike,<br></p>
<p>to start with, it'd be good to know what kind of data you are
working with. Is your "DSM" a raster file (i.e. pixels) or a vector
file containing the contours?</p>
<p>If it's a raster, you can create the contours by selecting
"Raster" -> "Extraction" -> "Contour" from the menu, then
select your input (raster) file and an appropriate interval, as
well as an output file (your contours will be saved here). Also,
check the "Attribute name" box and enter something ("ELEV" is a
good idea) into the field next to it. This will allow you to filter
the contours later.</p>
<p>Load the contour file into QGIS, if not done automatically, and
right-click on it in the Layers Panel (like Matt suggested). If
your height attribute is called "ELEV" and you want to display the
lines between 0 and 10 (unit is the same that your raster file was
in), you can enter<br></p>
<p>"ELEV" > 0 AND "ELEV" < 10</p>
<p>in the "Provider specific filter expression" section. Press OK
and you should have what you want. This filter does not change the
dataset, and if you load the same file again, you will have the
original lines again.<br></p>
<p>Cheers,<br>
Lukas<br></p>
<br>
<div class="moz-cite-prefix">On 03.07.2017 13:53, imagineaerial
wrote:<br></div>
<blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' style="border-left:2px solid #CCCCCC;padding:0 1em" type="cite" cite="mid:D2D404CA-6524-4DC1-84FA-AE312837D478@imagine-aerial.com">
Matt,
<div class=""><br class=""></div>
<div class="">Thanks for the response. I am afraid that I am
still pretty new to all of this, would you mind going into a little
more detail</div>
<div class="">for me? For instance, I am not familiar with
syntax and SQL. Also, what does field X and Y signify? I am
working off of </div>
<div class="">a simple DSM that was created using a UAV.</div>
<div class=""><br class=""></div>
<div class="">Thanks for any additional help!</div>
<div class=""><br class=""></div>
<div class="">- Mike</div>
<div class=""><br class=""></div>
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<pre>Lukas Winiwarter
Stud. Ass.
Tel: +43-(0)1-58801-12246
Fax: +43-(0)1-58801-912246
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<pre>TU Wien,
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Research Group Photogrammetry
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