About Ridgelet: Contour Camp
Read a survey, compare possible landscapes and plan an approach to camp. Ridgelet: Contour Camp is a 3D geography puzzle combining equal-elevation contour evidence with a small, exact terrain bank. Select a landform that agrees with the supplied contour segments and spot heights, then choose a camp gate and predefined trail meeting the study’s limits.
The map and model share a north direction, a 100-metre grid and a 20-metre contour interval. The 3D panel shows your current hypothesis at equal horizontal and vertical scale. A live ledger reports the camp-gate elevation, the trail’s steepest absolute grade, total uphill climb and horizontal distance. Advanced studies also constrain the highest-to-lowest corner relief of a marked 100 m × 100 m survey zone.
Explore 180 surveys across Contour Scouts, Trail Readers and Camp Surveyors. Compare three or four terrain candidates, four to six camp gates and up to two predefined approaches per camp. Undo a choice, revise the plan or request a hint that highlights one possible next choice without applying it.
Partial contours do not reveal every detail between measurements. Some surveys support more than one landscape, and every evidence-consistent landform and camp/trail plan meeting the stated requirements is accepted. The limits are fictional puzzle requirements, and the marked survey zone is a map footprint rather than an ordinary tent pad.
Earn up to three stars per survey and improve your best result on replay. Best stars, course position and sound preference save on this device when browser storage is available.
How to Play Ridgelet: Contour Camp
Choose Contour Scouts (Easy), Trail Readers (Medium) or Camp Surveyors (Hard). Each course contains 60 surveys. Easy offers three terrain candidates, four camp gates and one approach per camp. Medium offers four candidates, five camps and two approaches; Hard offers four candidates, six camps and two approaches.
Read the partial measured contour segments and spot heights on the survey map. North is up, adjacent grid nodes are 100 m apart and the contour interval is 20 m. A contour segment joins equal elevations. Unshown areas are unsurveyed; additional contour lines in those areas do not contradict the given evidence.
Choose a terrain hypothesis, a marked camp gate and one offered approach trail. Changing the camp chooses its first approach; you can then switch to the other approach where offered. The 3D model shows the chosen candidate, its full contour lines and your planning overlays. It uses equal horizontal and vertical scale.
Meet the camp-gate elevation band and maximum absolute trail grade. Grade is 100 × absolute height change / horizontal run, so steep descents count as well as climbs. Medium and Hard also limit total uphill climb: add positive elevation gains only. Hard adds survey-zone relief, the highest minus lowest of the four corners of the marked 100 m × 100 m footprint. Trail distance in the ledger is horizontal map distance, not distance along the sloping ground.
Choose any supported plan meeting every limit, then Check camp plan. Undo choice restores the previous terrain/camp/trail selection, Reset plan returns the initial choices and Survey hint highlights one suggested choice without applying it. Reset and undo preserve unsuccessful checks and hint use.
Desktop: 1–4 selects an offered terrain in visible order, A–F selects an offered camp in visible order, and Left/Right arrows cycle the selected camp’s approaches. Enter checks the plan or continues after success, Z undoes a choice, R resets the plan, H requests a survey hint and M toggles sound. Escape closes help. Tab and Enter activate focused controls normally.
Mobile: switch between the survey evidence and 3D hypothesis views, use the terrain/camp/approach buttons, or select a camp gate or approach in the 3D model. The same live constraint cards and route ledger explain the current plan. Use the on-screen Undo choice, Reset plan, Survey hint, Check camp plan and sound controls.
Three stars require no unsuccessful checks or hints; two stars allow up to two unsuccessful checks without hints; every completed survey earns at least one star. Best results are retained when replaying a survey.