A cartographer creates a topographic map using contour lines every 10 meters. A hill rises from 120 meters to 680 meters above sea level. How many contour lines (including both elevations) appear on the map? - Sourci
Creating Accurate Topographic Maps: Understanding Contour Lines
Creating Accurate Topographic Maps: Understanding Contour Lines
A topographic map is an essential tool for cartographers, hikers, geologists, and urban planners. It visually represents elevation changes across a landscape using contour lines—imaginary lines connecting points of equal elevation above sea level. One common practice is defining contour intervals that simplify terrain interpretation while maintaining precision.
The hill in focus rises from 120 meters to 680 meters above sea level. With a standard contour interval of 10 meters, cartographers carefully determine how many contour lines appear on the map. But how is this calculated?
Understanding the Context
Understanding Contour Lines and Intervals
Contour lines mark specific elevation levels. For example, every 10 meters—120 m, 130 m, 140 m—up to 680 m—each represents a distinct elevation. Since the base elevation is 120 m and the peak reaches 680 m, the total vertical rise is:
680 m – 120 m = 560 meters
With a 10-meter contour interval, the number of elevation steps is:
Image Gallery
Key Insights
560 ÷ 10 = 56 intervals
However, contour lines are drawn at each elevation point, including both the starting and ending points. This means the first contour line appears at 120 m, and the last at 680 m, spanning exactly 56 intervals.
Total Number of Contour Lines
Because each elevation increment corresponds to a single contour line, and both endpoints are included, there are 57 contour lines on the map.
Visual and Practical Implications
🔗 Related Articles You Might Like:
📰 You Wont Believe How Fast You Can MP3 Download Your Favorite Songs! 📰 Get Your Fav Spots Instantly: Fast & Free MP3 Download Secrets Revealed! 📰 3-Crack the Code: Free MP3 Downloads Youll Regret Missing! 📰 Business Grants 3691387 📰 O Reilly Stock Price 📰 Artificial Intelligence Tattoo Generator 📰 Bendy Secrets Of The Machine 📰 Shock Update Funniest Random Pictures And Experts Investigate 📰 Struggling To Send Files This Outlook Attachment Size Limits Will Shock You 625475 📰 Unlock Perfect Looks With This 10 Set Cosmetic That Everyones Raving About 266169 📰 Adt Control 7804340 📰 Father Divine 📰 Reels Dow The Secret Weapon To Instant Viral Engagement Is Here 5657528 📰 Indiana Jones Game Ps5 8442382 📰 Land Your Role At Fidelity Com Careerspay Rises Benefits You Cant Resist 3575521 📰 Yawkey Pharmacy 📰 Idfc First Bank Share Price 📰 Safari Most Recent VersionFinal Thoughts
This structured elevation representation helps hikers gauge steepness, engineers plan construction, and scientists model watersheds or land degradation. Precision in selecting interval size—like 10 meters—ensures clarity without cluttering the map.
In summary:
- Start: 120 m
- End: 680 m
- Elevation range: 560 m
- Contour interval: 10 m
- Contour lines drawn at: 120, 130, ..., 680 (inclusive)
- Total contours: 120 → 130 → ... → 680 = (680 – 120)/10 + 1 = 57 lines
This methodical approach underscores the cartographer’s role in transforming raw terrain into actionable geographic knowledge.
Key SEO Keywords:
topographic map, contour lines, elevation intervals, cartography, 10 meter contour interval, hill elevation 120m to 680m, cartographic accuracy, topographic mapping, contour line count, terrain representation
Use this detailed breakdown to enhance understanding of how contour lines symbolize elevation—and how cartographers determine how many to include on a topographic map.
