A thematic pattern layer is a layer that has several sections or intervals.  An example is a census tract layer that shows several intervals for each of several ranges

 

This section makes use of two fields that are contained in the ACS 2022 Itemset1 fields.

 

D001=D001 Total Population

S095=S095 U.S. Citizenship Status -- Foreign-Born Population

S096=S096 U.S. Citizenship Status -- Foreign-Born Population -- Naturalized U.S. Citizen

S097=S097 U.S. Citizenship Status -- Foreign-Born Population -- Not a U.S. Citizen

 

These fields are included in the current VDAGIS US1_CC project (8/5/24) in the shapefile "cb_2022_us_tract_500k_acs2022itemset1.shp".

 

In this section the VDAGIS companion tool CV XE GIS (CV) is used to operate on the Base project, adding a new layer to the Base project. The resulting project may be opened with VDAD or CV. The objective is to create a thematic map view of the Foreign-Born Population -- Not a U.S. Citizen (S097) as a percent of the total population (D001) with 6 intervals using the Layer editor to manually define the intervals.

 

Step 1. Add a shapefile creating a new layer.

 

With CV running, open the GIS project US1_CC.gis.

 

Add the shapefile cb_2022_us_tract_500k_acs2022itemset1.shp (from the same folder where project US1_CC.gis is located).

.. use the AddLayer button (+ icon, second to left on second toolbar)

.. this adds the new layer to the top of the legend panel layers

.. dbl-click that layer in the legend panel; the layer editor opens

.. click in the layer tab and set the Caption edit box value to "Tract %ForeignBorn NonCitizen"

.. click the OK button on the layer editor form, closing the layer editor

 

Save the project as us1_cc_demo.gis (to the same folder where project US1_CC.gis is located).

 

Step 2. Add the first of 6 sections or intervals using the layer editor

 

Dbl-click the "Tract %ForeignBorn NonCitizen" layer opening the layer editor.

 

Make these settings:

Section tab:  key in "100*s097/d001>=20" to the "Render if ..." edit box.

.. set the Legend edit box to "20% or more"

Area tab: set the Area Color to light red. set the Outline Color to a darker red.

 

Click OK, keeps settings, closes layer editor.

Save the project .. not required but gives an initial view and saves work in event of error in next steps

 

This is the  completed view of Layer Editor form after completing all steps below.

 

 

Step 3. Add the second of 6 sections or intervals using the layer editor

 

Dbl-click the "Tract %ForeignBorn NonCitizen" layer opening the layer editor.

 

Make these settings:

Section tab: add another section: click the + button in lower left of the layer editor form.

.. key in "100*s097/d001>=15 and 100*s097/d001<20" to the "Render if ..." edit box.

.. set the Legend edit box to "15 - 20%"

Area tab: set the Area Color to light salmon. set the Outline Color to a darker orange.

.. check on "Include in Legend" checkbox

 

Click OK, keeps settings, closes layer editor.

Save the project .. not required but gives an initial view and saves work in event of error in next steps

 

 

Next Steps. Add the remaining 4 sections or intervals using the layer editor

 

Section 3: Make these settings:

Section tab: add another section: click the + button in lower left of the layer editor form.

.. key in "100*s097/d001>=10 and 100*s097/d001<15" to the "Render if ..." edit box.

.. set the Legend edit box to "10 - 15%"

Area tab: set the Area Color to light yellow. set the Outline Color to a darker yellow.

.. check on "Include in Legend" checkbox

 

Section 4: Make these settings:

Section tab: add another section: click the + button in lower left of the layer editor form.

.. key in "100*s097/d001>=5 and 100*s097/d001<10" to the "Render if ..." edit box.

.. set the Legend edit box to "5 - 10%"

Area tab: set the Area Color to light green. set the Outline Color to a darker green.

 

Section 5: Make these settings:

Section tab: add another section: click the + button in lower left of the layer editor form.

.. key in "100*s097/d001>=10 and 100*s097/d001<15" to the "Render if ..." edit box.

.. set the Legend edit box to "0 - 5%"

Area tab: set the Area Color to light blue, set the Outline Color to a darker blue.

 

Section 6: Make these settings:

Section tab: add another section: click the + button in lower left of the layer editor form.

.. key in "100*s097/d001>=10 and 100*s097/d001<15" to the "Render if ..." edit box.

.. set the Legend edit box to "NA"

Area tab: set the Area Color to light gray, set the Outline Color to a darker gray.

 

Finishing up

Click OK, keeps settings, closes layer editor.

Drag the new layer under the States layer.

Save the project.

 

Final view: