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Intro to GIS
Transcript of Intro to GIS
Geographic Information Systems
What does that really mean...?
Urban Economics has partnered with ESRI to offer an ArcGIS License and training
BakerHostetler would like to utilize ArcGIS for FDOT Right-of Way Projects
I DO NOT expect you to be an expert by Wednesday...so relax.
A suite of tools used to capture, store, manipulate, analyze, manage, and present all types of geographical data.
This is the power of GIS
Putting data in space
Representations of the real world
GIS puts data into "stackable" thematic layers
Good for general cartography. Most available GIS data is in vector format.
Cell based. Like a pixel.
Used in imagery and modeling
What is it?
Nuts and Bolts
Data is the Key
Underlying database/attribute table
Each spatial feature is linked to a record in the attribute table.
Gives users access to information in space.
Segments of ArcGIS
"Application you use to visualize and edit geographic data, perform GIS analysis, and create professional-quality map products."
Application used to browse, manage, and document geographic data.
"The window into your GIS database".
Provides an organized collection of tools used for GIS analysis, data management, data conversion, etc.
GIS Solves Problems
6:30AM-Your alarm goes off You get up and turn on the lights.
Your clock radio and lights are powered with household electricity. Electric utility companies serving millions of customers use GIS to manage their complex infrastructure, which consists of transmission and distribution lines and utility poles.
7:00 AM-You make a pot of coffee.
The water the coffee is made with is provided by a water utility company. The utility uses GIS for customer service, emergency response, water distribution, infrastructure maintenance, automated mapping, network tracing, flow analysis, and other aspects of engineering, operations, administration, and finance.
7:30-You drive to work.
The community uses GIS for managing its transportation infrastructure. More than 80 percent of the information used to manage road, rail, and port facilities has a geographic component.
And you haven't even gotten to work yet...
The ArcMap Interface
"Data about data"
Getting Your Feet Wet
Points, Lines, & Polygons
Enough From Me...
Let's get the ball rolling with Exercise 1.
Further Down the Rabbit Hole
Let's get to it.
What am I doing here?!
Comfortable with GIS
Use its basic functions
Maybe even make a map.
Geographic Data Models
Points - a single x,y coordinate pair.
Lines - two or more x,y coordinate pairs.
Polygons - lines that close to form the polygon boundaries.
BakerHostetler - Training Session
Storing Spatial Data
New data standard for ESRI
"Container" for all spatial datasets
Majority of data you find will be Shapefiles
Actually a collection of 6 files
Data will come as typical image formats
.tif, .sid, .jpeg
Also contain a spatial reference component
Saving does NOT affect spatial data (Shapefiles, rasters, etc.)
You know what to do...
Used to find features that have a particular set of attribute values
Result is a set of selected features
Utilizes basic SQL
Finds features based on their locations relative to other feature.
There are four main types of feature location relationships
Near (within a distance of)
Exercises 4 & 5
Select, select, select...
Know your audience
What am I trying to say?
Legend — explains the symbology used in the map body. Without a legend, the map's audience may not understand what the symbols mean.
Title — conveys the map's subject to the audience.
Scale — the map scale can be numeric (1:10,000), verbal (1 inch equals 10,000 inches), or graphic (a scale bar).
North arrow — shows a map's orientation (how the features in the map relate to north).
Sources of the data shown in the map
Name of the map creator or organization
Date of publication
Informative text about the map's subject or purpose
A graph, table, or report based on the data in the map
A neatline (graphic border) that helps to group the map elements together
Internal borders that categorize or rank the map elements
Images, such as a company logo or an aerial photo
All maps should have:
The best maps have:
The home stretch.
Projections, coordinate systems, georeferencing.
Joins and Relates
Creating and editing data
Spatial statistics and analysis.
Congratulations, you survived.
Google and ESRI Help are your friends.
More training available if anyone is interested
I will be back for the FDOT/ROW training
Brian walks in and asks...
"I need you to find all of the vacant commercial properties within 1.5 mile of any airport (no helipads, seaplane basins, etc) in Orange County."
"Oh, and make me a map of the properties near Orlando Executive"