Rockbridge Township, IL Elevation & Topographic Map
Elevation
600 ft 185 m570 ft 175 m550 ft 165 m510 ft 155 m470 ft 145 m450 ft 140 m
Contours every 200 ft, bold every 1,000 ft
USGS 3DEP · U.S. Census Bureau
How to use this mapviews, tools and data
- Elevation
- Ground colored by height from green (lowest) to white (highest), with contour lines every 40–500 ft (USGS data).
- Satellite
- A 2016 satellite photo at 33 ft (10 m) detail; contours off.
- 3D
- Tilt and turn the terrain; hills are raised 1.5×, or set ×1 for true height.
- Click or tap anywhere
- The exact elevation of that spot in ft and m.
- Measure
- Pick two points for the climb, descent and grade along a straight line.
- Township area
- Fades everything outside the official township boundaries (US Census).
Elevation Data
Rockbridge Township sits at about 580 ft (175 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.
Typical elevation
580 ft 175 m
most residents: 540–590 ft
Lowest
450 ft 140 m
on the south side
Highest
600 ft 185 m
on the north side
Average
530 ft 160 m
all land inside township boundaries
Rockbridge Township spans about 150 ft of height, so no single spot tells the whole story. The ruler shows where its people live, and where the other numbers you'll see come from.
| Figure | Elevation |
|---|---|
| Typical Where people live: half of residents higher, half lower | 580 ft175 m |
| Highest point Inside township boundaries, on the north side | 600 ft185 m |
| Lowest point Inside township boundaries, on the south side | 450 ft140 m |
| Town center USGS map point for Rockbridge Township | 540 ft165 m |
| Average of all land | 530 ft160 m |
Elevation profile, south to north
8.8 mi south to north through the town center.
Topographic Map
- Location
- Township in Greene County, Illinois, United States
- Population
- 1,489 2024 est.
- Land area
- 47.7 sq mi + 0.1 sq mi water
- Density
- 31 per sq mi
- Coordinates
- 39.2692° N, 90.2043° W
- Time zone
- Central UTC−6 / −5
- Landform region
- Central Lowland
- Drains to
- Macoupin Creek → Illinois River → Mississippi River → Gulf of America
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Sources: U.S. Census Bureau, USGS
Nearby Places
Nearby towns by typical elevation
- Fidelity630 ft
- Medora610 ft
- Chesterfield590 ft
- Chesterfield Township590 ft
- Fidelity Township590 ft
- Greenfield580 ft
- Rockbridge Township580 ft
- Linder Township560 ft
- Western Mound Township560 ft
- Ruyle Township540 ft
- Rockbridge540 ft
Rankings by typical elevation
- Towns in Illinois2,090th highest of 2,872
- Towns in Greene County9th highest of 22
Peaks and hills nearest, by height
- Witachek Mound720 ft
- Spankey Hill690 ft
- Zerby Hill670 ft
- Shanks Hill610 ft
How we measure
- Typical elevation: the population-weighted median: every 2020 Census block inside the township boundaries, at its USGS 3DEP height, weighted by the people who live there. Half of residents live higher, half lower.
- Lowest, highest, average: USGS 3DEP bare-earth heights on a 1 arc-second (≈100 ft, 30 m) grid, land only, inside the Census township boundaries (TIGER, Jan 1 2026).
- Pits: the lowest point is the lowest ground outside closed hollows (quarry floors, mine pits, terrain-model artifacts): any hollow under 0.4 sq mi (1 km²), and any hollow under 2 sq mi (5 km²) whose floor is more than 100 ft (30 m) below its rim; and outside patches below sea level of under 0.4 sq mi (1 km²). The single lowest 3DEP cell, 450 ft at 39.2293° N, 90.2951° W, is in such a hollow or patch and is not counted.
- Nearby Places: nearby towns and rankings use each town's typical elevation, so every town is compared like for like. Rankings count every city, town, township and census-designated place, including places inside a town. Peaks and hills: the nearest summits with at least 980 ft (300 m) of prominence within 62 mi (100 km), then federal (GNIS) summits within 16 mi (25 km) when there are fewer than 5; each is the 3DEP top on a ~7 ft (2 m) window, or the NGS published height when a usable survey mark sits within 160 ft (50 m) of it (shown as published).
- Rounding: computed heights are rounded to 10 ft (5 m), or to 1 ft (1 m) under 100 ft; 3DEP is good to about a meter, not a foot. Published figures (FAA airport elevation, NGS survey heights) are shown as their publisher gives them.
- Datum: North American Vertical Datum of 1988 (NAVD 88). NGS plans to replace NAVD 88 with a new datum (NAPGD2022); heights will then shift slightly.
- Sources: USGS 3DEP, GNIS, Watershed Boundary Dataset and physiographic provinces; U.S. Census Bureau (boundaries, 2020 blocks, 2024 population estimates, Gazetteer areas); BTS time zones. All public domain.