|
|
.. Module 2 Geography, Geometry & Shapefiles Contents • Main -- Course Main Section • Module 1 -- About GIS; GIS Tools and Data Setup/Installation • Module 2 (this module) -- Geography, Geometry & Shapefiles • Module 3 -- Subject Matter: Statistical/Administrative Data • Module 4 -- Integrating Subject Matter with Shapefiles Interpreting & Presenting Data Module 2 -- Geography, Geometry & Shapefiles Learning Objectives • Understand geographic summary levels, geocodes • Understand shapefile structure and use • Ability to access and use pre-existing shapefiles • Ability to address code address data and create related shapefile Recent/New Federal GeoStatistical Data • Census Bureau American Community Survey 2023 1-year estimate (ACS2023) - Detailed demographics for areas 65,000 population and over; release date 9/12/24 see in calendar - Reviewed in Modules 3/4 .. learning about: .. why these data are important .. how to access & use these data - Example of using Census API call to access ACS 2023 1-year poverty data by Congressional District .. https://api.census.gov/data/2023/acs/acs1/profile?get=DP03_0128PE,DP03_0129PE&for=congressional%20district:* .. Two items in file(ACS2023 1 year estimates) plus state and 118th CD codes .. DP03_0128PE Percent of Families and People whose Income in the Past 12 months is below poverty level -- All people .. DP03_0129PE Percent of Families and People whose Income in the Past 12 months is below poverty level -- People under 18 yrs - More in Module 3 • Census Bureau 2024 TIGER Digital Map Database (TIGER2024) - annual update to the Topologically Integrated Geographic Encoding & Reference shapefiles and related data - make this census block level map using iVDA with Base project TIGER 2024 block & roads layers. - the 400 Myrtle St street segment (see pointer) is a bounding street segment for blocks 060590626052003 and 060590626052002 . - click the street segment to show the street segment profile.  Overview & Getting Started Selected GIS Stories using iVDA (below) • Examining demographic characteristics of a metro -- below. • Related drill-down geography -- below. Today, review of selected geography -- summary levels • Core-Based Statisitical Areas (CBSAs --MSAs/MISAs) • Counties • Census tracts • Congressional Communities • K-12 Schools • K-12 School Districts • Geocodes for these summary levels • Using point, line, polygon shapefiles • Accessing Census/TIGER sourced geographic data to show these areas in a map - using the Census Bureau TIGER files .. shapefiles - an example .. accessing TIGER shapefiles - accessing/using a TIGER shapefile 2023 CBSA - mostly geography only; need to integrate subject matter data. Focus on School & School District Geography • all K-12 public schools and school districts are included as layers in the VDAGIS "Base" project. - these layers are based on shapefiles that include integrated multi-sourced subject matter. • annually updated school district shapefiles (no subject matter) can be downloaded and used with desktop GIS software. - the Census TIGER shapefiles are available for elementary, secondary & unified school districts > some states are only unified (PK-12) > some states are combined elementary & secondary with overlapping geography area coverage - the Census TIGER shapefiles are available state-by-state as "TL" and "CB" versions - the 2024 TIGER "TL" (extend to U.S. 3-mile linit & match blcck level geography) shapefiles may be downloaded here: - these shapefiles (by type of district) have slightly different field names. - State-by-state Elementary School Districts - State-by-state Secondary School Districts - State-by-state Unified School Districts - the 2023 TIGER "CB" (smoothed & truncated at shoreline) may be downloaded here: - these shapefiles (by type of district) have slightly different field names. - All U.S. Elementary School Districts - All U.S. Secondary School Districts - All U.S. Unified School Districts - match the ACS 2023 data - there are no 2024 TIGER "CB" shapefiles (expected spring 2025) • annually updated public K-12 schools shapefiles (no subject matter) can be downloaded and used with desktop GIS software. - not available from Census, only National Center for Education Statisitics - part of the Common Core of Data (CCD) program -- annual school year based - All U.S. 2022-23 Public Schools • VDA Discovery School Districts Using iVDA .. iVDA part of Visual Data Analytics .. see more about VDAGIS below .. iVDA works on any device; iPhone (not recommended due to screen size) .. start-up view presented below is an interactive mapping window .. watch video .. iVDA is an iframe version of VDA Web GIS4 ..open related VDA Web GIS4 .. sse about using VDA Web GIS4 below .. the page being viewed now is located at https://proximityone.com/gis/1/gis12.htm In this section, examine school district geodemographics of interest using iVDA with the "Base" project. School, school district and related layers are used. See related interactive table. In this application grade relevant children enrolled in school are examined. iVDA is one part of a broader VDA GIS resource framework. See more about VDA GIS. In the iVDA frame below, enter an address or location in the searchbar and press enter. .. enter "Kansas City, MO" .. not case sensitive, no quotes .. the map view zooms to the school district containing the location and places a blue triangle at the location. In the Legend Panel at the left of the Map Window, scroll down to "School Districts GRC %Poverty" layer, check on, check + expanding intervals view. .. the map refreshes showing patterns of grade relevant children, percent in poverty. Click the blue marker and see the Kansas City MO School District highlights in the map .. and a demographic profile is displayed in the lower left. .. here you can examine selected demographic subject matter items. .. as shown in the map patterns, 25% or more of Grade Relevant Children are in poverty. .. as shown in the demographic profile, the 2022 school age population in poverty was 29,645 of a total population of 205,890. Try school districts of interest. Visual Data Analytics Web GIS iVDA is presented below in an interactive mapping window .. watch video Below is a static graphic example of using iVDA as described above. 
Supplemental Topics
|
|
|
