ArcGIS Desktop part 31 (projections and layers) Video Lecture | Way to Learning GIS and ArcGIS - Data & Analytics

hello everyone this is exercise number
13 a and in this one we will concentrate
on projecting data in arcmap
so as you can see on each of these
data's or
each of shape files normally has
something like you know coordinate
system so in the shapefile properties
you can easily see that this has a name
GCS north american 1983 you will see
spheroid and also datum prime meridian
and the angular unit is degree which is
different maybe from projected systems
like the WGS UTM system or projection
which is the fondant on meters and yeah
so this is something like like a like a
projection of a feature and by using
this and you know click and track it
here to the project 13 a you can see
that this projection has some
difficulties maybe as you can see the
proportion from Alaska when compared to
our Texas isn't correct so as you may
all know the mikado system which is
another possible projection system which
is yeah which represents degrees
correctly but not the sizes of the
object this is some yeah it preserves
the shape but it distorts of area it is
written in the book and page 342 so same
as he same here the area is way too big
for Alaska and Montana located over here
seems to be biggest Texas in fact Texas
is half or SS s largest Montana so we
will use another system here
and we will do that on the fly that
means you won't touch the projection
system of the feature file or the shape
file where that you will distort um the
data view so you will assume that the
data has another projection and so it's
it's the new projection on you
representation on the screen is
calculated on the fly so it will be
recalculated every time you will check
around your your view so how to do that
we have created this view here and what
what we would like to come up with is a
view of population growth on this main
window and population grow in Alaska and
have eye as well on this one now so um
first of all let's check here the
properties due to the fact that we would
like to have a special symbology here
state name now we would like to more
what is written down here population
growth
okay some numbers change
no let's give it with quantities and
let's put the color ramp not that um
flashy so maybe use this color round
okay so there have been some growth from
especially in Texas and I think that's
California so I'm what we will do is we
will right-click on the lower 48 so this
is some some some kind of looking area
or something like that so this is a
group this is a base map layer no well
this is um base map not no no no no
what is that a dataframe yeah it's a
dataframe sorry for that so I'm
right-clicking friend set for properties
and you can find their coordinate system
so now the coordinate system is written
here to be GCS nor North American 1983
and we will switch that to a predefined
projected system and this projected
system is in there in the folder North
America
which is located in a folder continental
so North America and here we have um
this Elvis projection system and we will
use use I contain continuous contiguous
use a and there the equal area just
click on OK and we hope it will be
reprojected on the fly so now we will
use the zoom in function to change the
visible extend oh well this one's a
little bit too big maybe just track the
whole thing a little bit on to the left
so what we will do now is we will
activate then Hawaii we will add some
data also the states which is located on
the chapter 13
so there it is click on the data view
zoom to the extent I think this was
harmonic some zoom to have on back to
the layout view
and once again we will change the
coordinate system for that afterwards as
well - huh by albers equal-area Konak
right-click on it set properties once
again predefined projected continental
North America and there is it Hawaii so
we can still zoom in a little bit there
we are so this is now Hawaii and once
again we need to do that as well for
Alaska so there it is Alaska actually
the size of these features isn't isn't
informative here in our case because we
are just interested in the population
growth if you would like to see the
change or the population growth as part
of or as a ratio to the area that would
be a program problem but we can neglect
this so we will go now here to
properties as well not this one so
Alaska save properties and change this
once again you can also create or search
for systems here in the in the pre in
available layers well due to the fact
that we only have one layer there's only
one projected system available so we
will search for the system ask again so
no that's that projected continent
emeritus North America and now we will
use Alaska so there we are
equal-sized well that was a little bit
too much so that's a good representation
change this once again a little bit so
now we have both we have every area
listed here in our map we have a little
lighter in legend well the legend isn't
that good because it's not representing
our it's not representing our color
scheme I'll just zoom into the into the
area using the zoom on the layout view
so we are having here percent growth
from 1 0 to 10 10 to 20 and 20 to 67
well I don't know where the scales come
from can I have a look in this shape
phone there's a percent of change
available has an attribute so we will
come change that to percent of change
and say ok now with the color scheme is
still incorrect as you can see here this
legend isn't I think this legend isn't
done automatically probably yeah
there's just a something like a frame
and not a legend and how to adjust that
so we have to choose choose the right
color scheme here
and that bluish
go with three colors these are too
flashy
so this one isn't correct either but you
will get the information so this is it
for a moment thank you very much for
watching goodbye