Our Consulting and Services Manager, Shawn Herring, wrote an article for this month's issue of AUGI World. Below is a portion of the article:
Finding GIS Data
Types of GIS Data
There are many types of GIS data formats. I am a shapefile kind of guy, shapefiles are very powerful and can be used for many different things in Civil 3D and even more so in Infraworks.
Several format options are described below:
To learn more about GIS integration with Civil 3D 2020, click here.
Geographical Information System (GIS) data is everywhere. There is GIS data for almost anything you
want to display and analyze, as long as you can find it! Using GIS data within Civil 3D (or Map 3D)
has been around for a long time, and there are several ways of utilizing that
data. Now with the latest Civil 3D
2020 version, it has become even easier to access data at any moment.
It is so simple inside Civil 3D that users of all experience
levels can succeed in working with GIS data.
This article looks at ways to utilize GIS data in Civil 3D by taking a
look at some of the methods that have been around a while, and some of the
latest updates in 2020.
Finding GIS Data
Being able to use GIS data is great, but where do you find
it? First, I’ll tell you what I tell my
kid when she asks me how to do her math homework… GOOGLE IT!
Pick the ounty that you reside in and Google, for example, “Utah County GIS”, and see what comes up! I typically find that you
get more information at the county level, such as building outlines, up-to-date parcel information and land
use information. From the state level, you get more imagery, topo, voter information, etc. But this really all depends on the state/county
and it differs all over! I usually begin
my search in order, by going to the county, state, and then federal.
Here are a few sites for open source GIS data:
Natural Earth - http://www.naturalearthdata.com/downloads/
ArcGIS Hub - https://hub.arcgis.com/
EarthExplorer - https://earthexplorer.usgs.gov/
OpenStreetMap - https://www.openstreetmap.org
GIS Lounge - https://www.gislounge.com/data-warehouses/
Free GIS Data - http://freegisdata.rtwilson.com/
OpenTopography - https://opentopography.org/
And probably thousands more!
Types of GIS Data
There are many types of GIS data formats. I am a shapefile kind of guy, shapefiles are very powerful and can be used for many different things in Civil 3D and even more so in Infraworks.Several format options are described below:
·
Shapefiles (SHP) – This is
probably the most common data format, and almost any GIS enabled software can
read a shapefile. A SHP typically
consists of 4 file types, and sometimes more.
Each file is needed as they all do something different. The file types include:
o
.SHP – Contains the geometry
o
.DBF – Contains the attribute data for
the features of the shapefile. Can be opened and edited in Excel.
o
.SHX – Spatial Index file for finding
features within the SHP
o
.PRJ – The projection file. Contains the coordinate system and projection
for the data.
·
File GeoDatabase – Collection
of files in a folder that can store, query and manage spatial data
·
KML – You’ve probably been
using this for years. KML is the Google
Earth default file format. Many
softwares, including Civil 3D, can export to KML.
·
GeoJSON – JavaScript Object
Notation – Lightweight data interchange format.
Can be converted to GIS/CAD pretty easily
·
Tab File – Very similar to
SHP, and used by MapInfo
·
GeoTIFF – Most widely
supported raster data format and is typically georeferenced (contains metadata)
so that data imports property.
·
CSV – Yes, CSV is a GIS
option and can be used/edited easily across all CAD platform products.
I told a joke once at an ESRI event 10 years ago, and I
still get flack for this, but here goes nothing!
What does GIS stand for??
GET IT SURVEYED!!
That joke goes over much better with the survey
audience. But I love working with GIS
data in all my projects. I typically don’t
begin a project without using some sort of GIS data, and with Civil 3D and
Infraworks, most project utilize the GIS data from beginning to the end.
It doesn’t matter if you’re new to the GIS world, or a
season vet, Autodesk makes working with multiple data sources easier than
ever.
By the time this article comes out I’m sure new and exciting
features will be in place. Autodesk and
ESRI seem to be working hard together to make the user experience better and
better as we go through the year and I look forward to seeing the improvements
being made.
To learn more about GIS integration with Civil 3D 2020, click here.
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