
Topographic Survey Data Analysis & Interpretation
Analyze topographic survey data into contour maps and site reports
What You Can Do
You can systematically process GNSS/RTK survey data, generate accurate contour maps at appropriate intervals, identify break lines and drainage patterns, and produce professional site analysis reports. The skill helps you validate field measurements before delivery, detect errors that could trigger costly revisits, and document methodology with confidence intervals that engineers rely on for grading plans and earthwork cost estimation.
Features
detect measurement errors and anomalies in GNSS/RTK datasets before processing
produce maps at appropriate intervals (1', 2', 5') based on terrain slope and project requirements
systematically locate and classify ridges, valleys, and drainage patterns in survey data
build coherent topographic surfaces with proper ground vs. vegetation classification
generate professional documents addressing cut/fill volumes, slope stability, and drainage implications
record methodology, accuracy assessment, and confidence intervals per ASPD/USSM standards
provide volumetric data and slope analysis for cost estimation and construction sequencing
classify terrain features and identify grade-critical areas for engineer review
Example Output
Example 1: Contour Map Assessment
- Input: RTK survey file with 847 points across 12-acre site
- Analysis identifies 2.3% of points as potential outliers (vegetation interference), flags for field verification
- Output: Contour map at 2-foot intervals with note: "Break lines added along drainage swale (←→ drainage flow)"
- Estimated cut/fill: 4,200 cy cut / 1,850 cy fill
Example 2: Site Analysis Report Section
- Slope stability assessment: North slope averages 18% grade, exceeds recommended 15% for grass cover without reinforcement
- Recommendation: Specify erosion control matting or terracing in grading plan
- Drainage implication: Low point elevation 312.4' requires inlet at station 2+15, outfall to existing storm system
Example 3: Data Quality Documentation
- Survey accuracy: ±0.08' vertical (95% confidence), meets ASPD Class B standards
- 3 anomalous points excluded (vegetation spike); methodology documented for engineer sign-off
What's Included
- SKILL.md instruction file with systematic data processing workflow:
- Contour Map Checklist: validation steps, interval selection guide, break line classification matrix
- Site Analysis Report Template: sections for slope assessment, drainage analysis, earthwork volumes, construction implications
- Data Quality Framework: error detection protocols, confidence interval calculation, anomaly flagging procedures
- Industry Standards Reference: ASPD accuracy classes, USSM documentation requirements, state-specific guidelines
Who It's For
- Land surveyors processing field data into engineering deliverables
- Survey technicians validating GNSS/RTK measurements and identifying anomalies
- Construction estimators using topographic data for earthwork bid preparation
- Site civil engineers reviewing survey input for grading and drainage design
- Project managers coordinating survey deliverables with design and construction schedules
Best For
- Processing raw GNSS/RTK survey files into coherent topographic surfaces
- Generating contour maps at appropriate intervals for site development projects
- Identifying drainage patterns, break lines, and grade-critical terrain features
- Detecting measurement errors and data anomalies before submitting to engineers
- Preparing professional site analysis reports with cut/fill volumes and slope assessments
- Documenting survey methodology and accuracy compliance per industry standards







