Transcript Using the Density Processing Tool (Part 2)

Using the Density Processing Tool (Part 2)
Goals of the Lesson:
• Demonstrate how to load the Density Processing Tool.
• Orientation to the Density Processing Tool.
• Demonstrate how to make density layers with the
Density Processing Tool and how to load them into
ArcMap.
Begin with the ArcMap set up as in part 1
Access the C drive of the computer (or wherever the Density Processing
Tool is located).
Find the Phase 13 folder (or the folder in which the Density Processing
Tool is located).
Locate and open the Density Processing Tool.
The Density Processing Tool should load.
Now, for a quick overview of the functions of the
Density Processing Tool.
A Quick Overview of the Density Processing Tool
The “Select Shapefile to Process” option sets the shapefile used to
create the density layer.
Do not change it – the xy geocode file is needed for the tool to work!
A Quick Overview of the Density Processing Tool
The “Set Output Directory” option specifies the directory in which
the density layer file will be generated.
Density layers can be output to any desired directory.
A Quick Overview of the Density Processing Tool
The “Select Symbology Layer” option can be used to apply a desired
appearance to the layer.
It does not need to be used at this point.
A Quick Overview of the Density Processing Tool
In the “Enter NAICS Codes” option, the NAICS codes for which the
density layer will be generated are entered.
A Quick Overview of the Density Processing Tool
A single density layer can be created for multiple NAICS types by
entering different NAICS codes, separated by commas.
A Quick Overview of the Density Processing Tool
A single density layer can be created for multiple NAICS types by
entering different NAICS codes, separated by commas.
42,49,4521
A Quick Overview of the Density Processing Tool
For help with determining what each NAICS code represents, a
spreadsheet list of NAICS codes is included in the Phase 13 Folder
(or the folder in which the Density Processing Tool is installed).
A Quick Overview of the Density Processing Tool
The spreadsheet lists the NAICS codes by major category (double digit)
……. and subcategories. (three or more digits)
A Quick Overview of the Density Processing Tool
When a NAICS category is entered into the Density Processing Tool to
create a density layer, all of the subcategories for that layer will be
included in the density.
For example, when 48 (transportation) is entered, all of its subcategories
(48XXX – all types of transportation) are also included in the layer.
A Quick Overview of the Density Processing Tool
Or, when 481 (air transportation) is entered, all of its subcategories
(481XX – all types of air transportation) are also included in the layer.
A Quick Overview of the Density Processing Tool
Again, when 4811 (scheduled air transportation) is entered, all of its
subcategories (4811X – all types of scheduled air transportation) are
also included in the layer.
A Quick Overview of the Density Processing Tool
The more refined the NAICS code used with the Density Processing Tool
(the more digits it has), the more targeted the density layer will be
towards a specific portion of a type of business.
A Quick Overview of the Density Processing Tool
The more refined the NAICS code used with the Density Processing Tool
(the more digits it has), the more targeted the density layer will be
towards a specific portion of a type of business.
A Quick Overview of the Density Processing Tool
The more refined the NAICS code used with the Density Processing Tool
(the more digits it has), the more targeted the density layer will be
towards a specific portion of a type of business.
A Quick Overview of the Density Processing Tool
The more refined the NAICS code used with the Density Processing Tool
(the more digits it has), the more targeted the density layer will be
towards a specific portion of a type of business.
A Quick Overview of the Density Processing Tool
Using a narrow (more digits) NAICS code to generate a layer will create
a more targeted layer, but that layer will also have sparser density.
A Quick Overview of the Density Processing Tool
The more refined the NAICS code used with the Density Processing Tool
(the more digits it has), the more targeted the density layer will be
towards a specific portion of a type of business.
A Quick Overview of the Density Processing Tool
The more refined the NAICS code used with the Density Processing Tool
(the more digits it has), the more targeted the density layer will be
towards a specific portion of a type of business.
A Quick Overview of the Density Processing Tool
The more refined the NAICS code used with the Density Processing Tool
(the more digits it has), the more targeted the density layer will be
towards a specific portion of a type of business.
A Quick Overview of the Density Processing Tool
The Variable to Calculate option selects the variable used to calculate
density. Employees should be used, as it is thought to be the best
variable for calculating density.
A Quick Overview of the Density Processing Tool
Use the pop up menu to select the variable.
A Quick Overview of the Density Processing Tool
The name for the new density layer is entered in the two name boxes.
A Quick Overview of the Density Processing Tool
The name must be no longer than 11 characters.
nys42g25r1
nys42g25r1
A Quick Overview of the Density Processing Tool
Move the slide bars to the right to increase the grid size…
….. or the search radius.
A Quick Overview of the Density Processing Tool
Move the slide bars to the left to decrease the grid size…
….. or the search radius.
A Quick Overview of the Density Processing Tool
Each grid displays the level of density for its search radius. In effect,
increasing the grid size lowers the resolution at which changes in density
are displayed, and decreasing grid size increases the resolution.
A Quick Overview of the Density Processing Tool
Now, for a quick demonstration:
= Employment Point
(Individual business)
A Quick Overview of the Density Processing Tool
The search radius adjusts how far away each grid cell will search for
employment points when calculating density. A larger radius will pull
in farther away points; a smaller radius will only count points near each
grid cell itself.
A Quick Overview of the Density Processing Tool
Now, for a quick demonstration:
= Employment Point
(Individual business)
Creating a Density Layer File
Now create a layer file based on the previous directions.
• Remember to not change the shapefile or symbology layer.
Creating a Density Layer File
• Select an output directory.
Creating a Density Layer File
• Enter the NAICS codes to be used in generating the density layer
separated by commas.
42,49,4521
A Quick Overview of the Density Processing Tool
• Set the Variable to Calculate option to Employees.
A Quick Overview of the Density Processing Tool
• Enter a name for the results and a name for the shapefile.
(make sure the name is no longer than 11 characters)
42g25r1
42g25r1
A Quick Overview of the Density Processing Tool
Quick advice on naming density layer files.
• An easy way to track density layer files is to name them by their
NAICS code, followed by the grid size and then the search radius.
(NAICS)g(grid size with no decimal)r(radius with no decimal)
• Since all layers are generated for New York State, there is no need
to name them by location (although it can be done).
For example, a layer for NAICS 42 with a grid size of .25 miles and a search
radius of 1 mile would be written:
42g25r1
A layer for NAICS 4811 with a grid size of .50 miles and a search radius of 3
miles would be written:
4811g50r3
• Although this method of naming layers is efficient, there may be
the need to abbreviate when using five or six digit NAICS codes in
order to keep the name under 11 characters long.
A Quick Overview of the Density Processing Tool
Set the Grid Size
… and the Search Radius.
A Quick Overview of the Density Processing Tool
Now Process the Density Layer.
A Quick Overview of the Density Processing Tool
For this example, a density file will be created for 42 (wholesale)
using a grid size of .25 miles and search radius of 1 mile.
This box will appear – click OK to begin processing.
A Quick Overview of the Density Processing Tool
The processing of the layer can be watched in the output directory.
Files will be displayed as “LOCK File” while the layer is being
processed.
A Quick Overview of the Density Processing Tool
When processing is finished, the layer file will be displayed.
The Density Layer is Ready to be Added to the Map.
Now Proceed to Part 3