Hi Parv,
in QGIS you can extend the list of tools with the python plugin.
Go in the Menu Plugins/Manage and install Plugins.
A dialogue opens and you can search the web for available plugins for QGIS.
If you search for "buffer" you should find 4 relevant plugins. Depends
on the repositories you have in your plugins-list.
You can extend this list in the settings menu.
The buffer tools are: Buffer by percentage, Multi Ring buffer,
Multi-distance buffer, Wedge buffer processing algorithm.
If you install MMQGIS Toolbox you will find another tool that creates
buffers.
hope this helps
Dieter
Am 22.05.2017 um 17:51 schrieb Parv Aggarwal:
Hi QGIS Community,
I’m Parv, an analytics intern at the Latino Community Credit Union
here in North Carolina. I’m tasked with finding and using GIS software
to visualize both US Census data and our membership data at micro
levels to determine best locations for expansions. As per my
instructions, this means being able to:
-Visualize Latino population by smaller units than zip codes. We have
worked with Census tracts in the past and that is ideal, but there are
even smaller areas with population data, like census blocks. If we
can see in a map where the higher number of Latinos live and also see
the streets so that we can imagine potential locations and draw areas
around them, we could identify optimal locations.
-If we get a proposal for a location, for example a realtor contacts
us and says “I have a great place for rent at 1309 Cúcuta Dr,” we
should be able to enter the address in the software and define an area
around it, draw that area and know how many Latinos live there. The
areas could be circles, free shape forms, circles cut by major
highways or barriers we would think people wouldn’t cross…
-Of course we should be able to add our own data to the software, like
those addresses of our current members, and be able to look at, say,
total balances of members who live in a defined area.
I have installed QGIS and am currently exploring its capabilities via
the user guide/training manual. I know I first have to do a join on
census csv population data and block shapefiles. Assuming I’m able to
do that, I am trying to find relevant sections that would show me how
to do this micro level aggregation of population data. I believe in
ArcGIS this is called “create buffers around a point” but I am not
sure if this is the relevant way to do it in QGIS or not. I searched
for buffers in the training manual but I still can’t tell if it means
the same thing or is relevant for my purposes. I’m also going through
the vector analysis and processing sections but end up getting lost on
what’s relevant and what’s not. I would greatly appreciate it if
someone could guide me on being more effective at looking at the
relevant features for the above needs, as I am unfortunately new to
using in-depth GIS softwares like this.
Sincerely
Parv
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