A question-led NSW layer checklist. Map observations remain subject to source, boundary, currency and professional interpretation limits.
Direct answer
Choose GIS layers from the planning question, not from the layer menu. Start with the correct NSW parcel, then add statutory planning, hazard, infrastructure and place-context layers only when each one can change the next check. Retain the publisher, layer name, data date, geographic unit and precision limit beside every mapped observation.
The planning question determines which GIS evidence belongs in the stack
Resolve the land first, add only layers that change the next check, then carry the publisher, date, geography and precision limit with the observation.
- Resolve the land
Match the address to the lot, deposited plan, boundary source and explicit study area.
- Check statutory controls
Pair incorporated planning maps with the written environmental planning instrument.
- Add decision context
Use hazard, infrastructure or place data only when it changes the next source or agency check.
- Retain the limits
Keep publisher, layer, vintage, geographic unit and precision beside every observation.
Resolve the land before selecting layers
An address pin is not a parcel boundary. Record the lot and deposited plan, the boundary publisher and any mismatch between the searched address and the selected land. Multi-lot sites need an explicit study area.
If the parcel is wrong, every later layer can be read correctly against the wrong land.
Statutory planning layers answer control questions
Zoning, Height of Buildings, Floor Space Ratio, minimum lot size and other incorporated planning maps help identify mapped controls. Read the map with the written environmental planning instrument. The colour or label alone does not explain definitions, exceptions or how the provision applies to a proposal.
Hazard and environmental layers identify further checks
Flood, bushfire, biodiversity, coastal, heritage and contamination-related datasets can identify a mapped trigger or context. A mapped intersection does not decide the assessment that follows.
Record the layer's purpose and scale. Some datasets support regional screening, while others may be suitable for site-level review. Neither should be treated as survey evidence unless the publisher says so.
Infrastructure layers explain access and constraint context
Roads, public transport, utilities and other infrastructure layers can support questions about access, servicing and surrounding conditions. Their presence does not prove available capacity, connection approval or delivery timing.
Use the layer to identify the next source or agency check. Do not turn a map symbol into an infrastructure commitment.
Place data needs the right geography and period
Population, households, employment, approvals and land-supply measures often use statistical or administrative areas rather than parcels. Keep the unit, period, denominator and boundary vintage visible. Do not attach an area average to a lot as if it were a parcel attribute.
A question-to-layer worksheet
Question-to-layer worksheet
A Plynth-authored method for choosing an evidence family from the planning question while keeping its main interpretation limit attached.
| Question | Useful evidence family | Main limit to retain |
|---|---|---|
| What controls may apply? | Parcel, EPI and incorporated maps | Written provision and project facts |
| What mapped hazards need review? | Official hazard and environmental datasets | Trigger is not assessment outcome |
| What infrastructure surrounds the site? | Transport, utilities and service layers | Presence is not capacity or approval |
| What is happening around the site? | DA, demographic and land-supply data | Period, geography and completeness |
What Plynth can and cannot claim
Plynth's current public product scope is NSW and includes map-led planning work. This guide groups public evidence by planning question; it is not an inventory of layers currently available in Plynth. It does not claim national coverage, survey accuracy, complete risk detection or a legally determinative answer from map pixels.
Sources and related methods
Then read how to verify zoning, height and FSR maps and the Plynth data coverage register.