The Slope Exceedance Report helps you quickly identify where landform gradients may increase erosion risk, so you can prioritise field inspections and intervention effort with confidence. By converting elevation data (DTM) into clear risk metrics, maps, and ranked priority sites, it turns a complex terrain dataset into practical decisions: how much of your area exceeds target slope limits, where the most severe zones are, and which locations to inspect first. The result is faster, more consistent planning for rehabilitation, safer on-ground execution, and better targeting of resources before risk escalates.
Note: The screenshot examples below are all taken from dummy data for demonstration purposes only and do not represent reality or customer data.
Status
The status pill is a quick overall indicator of whether any part of the AOI exceeds the selected slope threshold.
Exceedance detected: At least some AOI area is above the threshold.
No exceedance: No AOI area is above the threshold.
How to use it
Use this as a fast headline only. Always pair it with:
Current metrics (hectares and percent),
Risk interpretation (context), and
Priority sites (where to field-check first).
Current metrics
This section gives a quick snapshot of slope risk across your selected area (AOI).
Exceeds Threshold
The total area (in hectares and % of the AOI) where slope is steeper than your chosen limit (default set at 15°).
Higher values mean more of the site may need intervention.Within Threshold
The area (in hectares and % of the AOI) at or below the chosen slope limit.
Higher values generally indicate more land is suitable for standard rehabilitation activities.Severe Zone (≥30°)
The area (in hectares) with very steep slopes, which are typically higher risk for erosion.
These areas are often priority locations for physical controls (for example, regrading, armouring, erosion matting).Priority Sites
The number of hotspot locations selected for field checking. The default here is set as five.
These are ranked points to help teams focus on the most important areas first.
How to read this section quickly
Start with Exceeds Threshold and its percentage of AOI.
Check Severe Zone to understand high-consequence risk.
Use Priority Sites to plan field inspections.
Confirm overall status from the top-right indicator (On Track, Monitor Closely, or Intervention Required).
Slope distribution - exceedance zones
This section shows how the exceeding area is split across different slope bands, so you can see whether risk is mostly moderate or severe.
15–20°
Lower-end exceedance. These areas are above threshold but are usually less severe than steeper bands.20–25°
Moderate exceedance. Often requires closer review and targeted management.25–30°
High exceedance. Increased erosion concern and likely intervention planning.≥30°
Severe exceedance. Highest-priority risk zone for field assessment and physical controls.
What the chart and bars mean
The donut/summary graphic shows total hectares above threshold (“ha at risk”).
The legend and bars show how that at-risk area is distributed by band.
Percentages in this section are percentages of the exceeding area, not the whole AOI.
How to use it
Check which band has the largest share.
If more area sits in the higher bands (25–30° and ≥30°), treat the site as higher urgency.
Use this together with the priority-site map/list to guide field inspections and mitigation planning.
Risk interpretation
This section translates the slope results into a simple, action-focused summary.
Alert card (orange)
Shows the percentage and hectares of AOI above the selected threshold (for example, 15°).
This is your primary signal of how much of the site is outside target slope conditions.Severe zone card (pink/red)
Highlights the area at ≥30°.
These slopes are typically at elevated erosion risk and often need physical intervention before standard rehabilitation.Within-threshold card (green)
Shows the share of the AOI that is at or below threshold.
If this is above 50%, messaging describes a majority within threshold; if below 50%, it indicates less than half is within threshold.Recommended next step (blue)
Provides a practical action statement based on the analysis, including field-check priority sites.
How to use it
Treat the red and severe-zone cards as your risk/urgency indicators.
Use the green card to gauge how much of the site remains in acceptable slope range.
Follow the recommended next step and verify conditions on site at ranked hotspots.
Individual polygon summary
This section combines an interactive map and table to show each AOI polygon, its exceedance metrics, and where field checks should be prioritised.
What you’re seeing
Numbered markers (1 to 5): ranked priority hotspots.
Coloured polygons: each polygon’s colour reflects its Severity level in the table.
AOI outline: overall analysis boundary.
Basemap imagery: real-world context for access and planning (and optional recent aerial imagery, if available).
How ranking works
Priority sites are selected where exceedance is most concentrated/severe, then spaced apart to avoid selecting multiple points from the same small cluster.
Table columns explained
Zone: polygon name/identifier.
Area (ha): polygon area in hectares.
Exceeds (%): percent of polygon area above threshold.
Status: whether exceedance is present (Exceedance detected or No exceedance).
Exceedance index: weighted score of exceedance distribution across slope bands:
1*(% area 15–20°) + 2*(% area 20–25°) + 3*(% area 25–30°) + 4*(% area ≥30°).Severity level: category derived from the exceedance index (Nil, Mild exceedance, Moderate exceedance, Substantial exceedance, Severe exceedance).
Dominant category: exceedance slope band with the largest area in that polygon.
Severity level (from Exceedance index)
Nil: 0
Mild exceedance: >0 to <0.5
Moderate exceedance: 0.5 to <1.5
Substantial exceedance: 1.5 to <3.0
Severe exceedance: 3.0 to 4.0
Marker popup details
Max slope at/near the hotspot
Avg slope for nearby steep area
Excess above threshold
Open in Maps link for navigation
How to use it
Start with priorities 1 and 2.
Check on-ground condition, erosion features, and access constraints.
Use map links to send crews directly to each location.
Cross-reference with the Top 5 list for quick summary values.
Top 5 priority sites
This section is a compact, ranked checklist for field teams.
What each row includes
Priority rank (1 is highest)
Max slope at/near the site
Avg slope in the local hotspot area
Excess above the chosen threshold
Coordinates + Open in Maps for direct navigation
How to interpret rank
Higher-ranked sites combine stronger exceedance intensity and hotspot concentration, while applying spacing rules so sites are not all in one tiny area.
How to use this in operations
Inspect sites in rank order.
Record erosion condition, stability, and intervention need.
Use findings to prioritise controls (for example, regrading, drainage, armouring, matting).
Re-run the analysis after works or major rainfall periods to track change.
Important note
This list is a prioritisation aid, not a replacement for field judgement.
Always validate access, safety, and ground conditions before action.