ArcGIS Desktop part 29 (analyzing feature relationships 8: union features) Video Lecture | Way to Learning GIS and ArcGIS - Data & Analytics

welcome I want to exercise number 12 B
in which we will ask yourself okay how
to make a new feature out of a Union out
of two features or more features and by
doing so we will also create a new
feature in a project to define areas
where we can cut trees here in this
house release and so we'll start with
some buffer zones we're going on not a
lot of trees and a feature called stance
where it's possible to cut trees due to
the fact that it's our land and so these
are the areas and first of all I would
like to introduce you to the Union
function to create one feature that will
represent owned no cut areas so you can
either go on do processing say Union or
you can choose the analyst to overlay
and Union there go to geoprocessing
Union and we have some input features as
you can see here this is a input and the
output remain all differences so we will
have two inputs stream buffers and also
the nest buffers and we will store it
here in our geo database called Tongass
MDB this one is a default database so
always check whether it is a correct
database or not and we will save it as
no cut areas I've done this before so
don't be confused so we'll just click on
OK and the results will be shown in a
few minutes or a few minutes and a few
seconds sorry for that so we had on now
having year 1200 features think I think
these are a little bit more so we'll add
this now to the through the output and
as you can see here
all these have very specific you know
how to my college um geometries and
let's have a look here in the attribute
table for that layers you can see here
an effective for the stream before it so
the original f ID for the stream buffer
and an original F ID for the nest buffer
and there is a possibility to have an
overlap between these both so let's go
through this one here there's an S puff
of one so it belongs to the first
polygon in the f-18s buffer or the area
and also to the area with the four D
number thirty or select this one and
right-click zoom to
so as you can see it is totally inside
of one of these circles around these
nests and self belongs to both of them
we will use this information as an
identification later on for our cuttable
areas so what we will need to do now is
we will use these features or these
geometries and the geometries from
Stan's F to create a new Union would
flow then be asked for whether we can
countries over there or not so the input
features are now look at areas and
stands F we will store it here in our
database and say okay
Union takes some time as well so in this
one we had about 12 mm features I'm not
sure how many these features will be
so now I'm a little bit disappointed I
would just remove this one and also this
one due to the fact that the union of
both of them should include every every
circle as well so we'll just create a
new union and say you have no cut areas
and the stands f you store it here just
to make sure that everything is working
fine it could be due to some kind of
selection I've done there CAD areas on
the school too and just say okay
so now it's writing features I hope this
will work now so keep in mind I have
selected a feature prior so now I have
unselected everything so hope it's
working fine now I will add this to
display again and there we are just
change the color here here you now have
the whole area and these are now this is
now the Union out of the geometries of
no cut areas marked here blue on this
lightest blue and also the stands are
mocked you in darker blue let's keep
this use this color so these both
features were drawing each or union
union and will go here into detail on
and have looking on the upper part so
the upper part is quite important need
there these circular features are areas
where you have where you have your
buffer zones from the from the bird's
nest cells stream buffer here is minus 1
no cut areas is 3 to 3 which means it is
part of the no CAD areas let's use this
one here also 3 to 3 let's go to this
one you will have 4 you are having here
now
come on let's be a little bit more
specific
I think the sniffing tolerance is a
little bit too heavy so these are all
having half are these from no cut areas
so they are part of the new cut areas
and the effort from the nest buffer was
a totally original one I'm searching now
for their Fadi from the stand ID that is
there so we will do a selection on the
body from naka Darius and this frd from
local areas should be less than 1 click
on apply
I'm clicking close on them to the lair
so to me it looks like that these areas
are available for cutting trees and you
know we can come up with the symbology
tab we will choose unique values let's
say no cut areas although now at all
that yes or no maybe quantities oh
there's a label field and as you can see
the label should be less than one so
let's stick with that one
and let's go with two classes and let's
say the break value theory is now zero
okay okay let's have a look here
this is one possibility so you are now
having here um I'll just uncheck the
this one you are now having here a
mocked in red the errors we cannot all
we're not allowed to cut trees and areas
we can cut trees so you can also adjust
the label here in a moment so these are
areas where you are
well you can find cut areas and these
are no cut areas and click on okay so
this is one possibility
I know but this one is another
probably not so just leave it in a
moment like this otherwise keep keep a
look or I have look in my last video
tutorials regarding the expression of
various but this is it now for the
moment thank you very much for watching
take care and good bye