3D Value Per Acre Workbench
Load instructor-provided parcel data, select and audit the fields, calculate value per acre, render the comparison, investigate outliers, and export the method and interpretation.
Due November 4 at the start of class
Requirements and gradingUse course data
Data that still need confirmation
Assessment years, construction years, public-water wells and agricultural/forestal district boundaries need local confirmation. FEMA polygon layers are downloaded county snapshots with their package dates shown. Check current effective panels and later revisions before regulatory decisions. Blank areas do not prove that a resource is absent.
Save your progress here. Final assignments still go to Canvas.
Choose a real community dataset above or upload an approved parcel file. Read its exclusions and assessment-year status before interpreting. Practice data are fictional.
Linear (proportional below the display ceiling); map ceiling $1/acre. 0 parcels exceed the ceiling and share the maximum displayed height/color. Exact values and the distribution curve are not capped. Colors identify the lower quartile (up to $0), middle half, and upper quartile (from $0).
Compare three properties across the curve
Use the quartile filters to explore the map, then click and choose three properties yourself. The site shows where each one falls in the distribution; it does not choose them for you. Investigate each property and explain what the number does and does not mean.
Use the map or this keyboard-accessible list to inspect and add properties. Search by ID to narrow a large dataset.
Lower quartile: 0 parcels at or below $0 per acre. Middle range: 0. Upper quartile: 0 parcels at or above $0. Tied values can make the groups uneven.
Your comparison (0 of 3)
Select exactly three parcels. A spread across the curve can be useful, but you decide which properties best answer your question. Compare similar uses where possible, or explain why unlike uses limit your inference.
Use the comparison to discuss possible future investment, not to treat assessed value as tax revenue, profitability, or social worth.
Linear display. Height represents value per acre, not building height. Drag to pan; use the tilt and rotation controls for the 3D view. Scroll or pinch to zoom. Click a parcel to inspect its calculation and choose it for the three-property comparison.
- Mapped
- 0
- Invalid / missing
- 0
- Excluded
- 0
- Exempt flags
- 0
- Median parcel VPA
- Not yet calculated
- Total value / total acres
- Not yet calculated
Check parcel calculations and outliers
| Parcel / row | Value | Acres | Value per acre | Exempt |
|---|
Save your progress here. Final assignments still go to Canvas.
Explain the pattern
The rendering is evidence only when the calculation, record treatment, comparison, outliers, and limits are visible.
1. Record the method
2. Test the pattern
3. State the planning meaning and limits
4. Quality control and export
- Needs work | Analysis question and geography are defined
- Needs work | Valuation year and calculation fields are recorded
- Needs work | Join and invalid-record treatment are explained
- Ready | Public and tax-exempt parcel treatment is explicit
- Needs work | Three chosen properties and one outlier are investigated
- Needs work | Alternative explanation is considered
- Needs work | Conclusion, limitation, and next evidence need are visible
Complete this method note while working with the 3D map above.
Honor pledge and authorship
I pledge that I have neither given nor received help on this examination (quiz, assignment, etc.)
Follow the collaboration and AI rules in the syllabus. Include your signed pledge with the final individual submission.
Save your progress here. Final assignments still go to Canvas.