Lieu-dit · Mareuil-le-Port
Sous la Rosière
Sous la Rosière is a lieu-dit in Mareuil-le-Port, Vallée de la Marne, Champagne, whose largest tier is champagne.
3.95 ha
delimited
87 m
elevation
10.9 h
sun at harvest
Open on the mapWith the boundary, the plots, the sun through the year and the bedrock.
In figures
| Level | Champagneinao-aoc-viticoles-bulk (not in this commune) |
|---|---|
| Village | Mareuil-le-Port |
| Region | Vallée de la Marne, Champagne |
| Delimited | 3.95 hainao-aoc-viticoles-bulk (not in this commune) · cadastre-etalab (4 September 2026) |
| Planted | 3.83 hacadastre-etalab (4 September 2026) · ign-bdtopo-vigne (4 September 2026) · ign-rpg-2024 (5 September 2026) |
| Parcels | 73 |
| Grape variety | meunier 69 %, chardonnay 19 %, pinot noir 12 % also permitted: arbane, petit meslier, pinot blanc, pinot grisinao-cahiers-des-charges (7 September 2026) · dgddi-superficies-produits (7 September 2026) · franceagrimer-observatoire-viticulture (7 September 2026) |
| Organic | 0%agence-bio-cartobio (c. 5 September 2026) · agence-bio-operateurs (5 September 2026) |
Place in the village
Among the 87 named plots ranked champagne in Mareuil-le-Port, from high to low:
Position
87 m
elevation
18.0%
steep
WNW
west-northwest
foot
even slope
| Elevation | 87 m 74 to 104 mign-rge-alti (5 September 2026) |
|---|---|
| Daytime temperature | +0.21 °C by day, relative to the village centre at 130 m, ± 0.07 °Cmeteo-france-quotidiennes (18 September 2026) · meteo-france-postes (6 September 2026) · meteo-france-lsh (6 September 2026) · ign-rge-alti (5 September 2026) |
| Slope | 18.0% 10.2°ign-rge-alti (5 September 2026) |
| Aspect | west-northwest 282°ign-rge-alti (5 September 2026) |
| On the slope | 17% foot of the slope, on an even plane, 242 m drains onto itign-rge-alti (5 September 2026) |
Bedrock
- 8%Modern alluvium of the rivers 0.012–0 million years
- 52%Colluvium, mixed slope deposit about 0.1–0 million years
- 41%Palaeocene travertine of Sézanne 59–56 million years
Not a borehole: ordered by age, thickness by share of surface.
In the glass. As a group, colluvium says little about flavour on its own. In practice the rounder, earlier-approachable wines often sit on the thicker colluvial fans, while tension and ageing potential are more closely tied to slope, soil depth and vine age. (weak indication)
Not a true formation but a collective name for material that has come down from higher up the slope: limestone scree, lumps of marl, clay and loess, worked together by gravity, frost and rainwater. Most of it was deposited during and after the last ice ages, roughly the past hundred thousand years, and the process is still going on. What exactly is in the ground depends entirely on what lies upslope, so the same map colour can mean something slightly different from village to village.
For the vine. Usually loose, stony and deep, so the roots can go far and surplus water drains away quickly. Thanks to the fine material between the stones, colluvium generally holds more moisture in a dry summer than the thin soil on the bare rock above. At the bottom of the slope the deposit becomes thicker and finer, and because of the low position it is cooler and wetter there; where it contains a lot of limestone scree the active lime content can run high.
Characteristic of the mid and lower slopes of the whole Côte d'Or, including the scree fans at the mouths of the combes, as at Gevrey-Chambertin below the Combe Lavaux.
BRGM geological map at 1:50,000. It tells vineyards apart, not plots within a vineyard. The link between rock and taste is indirect: soil depth, water and warmth do the work, and slope, vine age and the cellar do the rest. Units on that map: C, e3, Fz.
brgm-bdcharm50 (4 September 2026)Sun and horizon
08:35
over the crest of the slope
19:32
behind the hill
10.9 h
sun at harvest
Grey: sun up, behind the hill or its own slope.
Around harvest the sun rises here at 08:35 over the crest of the slope and disappears at 19:32 behind the hill: 10.9 hours of direct sun on a clear day. The ridge reaches 9.0° above the horizon to the east.
| Irradiation | −2.3% versus flat land 962 kWh/m² from April to October, 48% of it diffuseunder the average cloudiness of 2005 to 2023 (PVGIS-SARAH3, EU JRC); direct, diffuse and reflected light togetherign-rge-alti (5 September 2026) · ign-lidarhd-mnh (6 September 2026) · ign-bdforet-v2 (5 September 2026) · jrc-pvgis-sarah3 (10 September 2026) |
|---|---|
| Open sky | 99.3% of the sky the slope itself sees; the surrounding relief blocks the restign-rge-alti (5 September 2026) · ign-lidarhd-mnh (6 September 2026) · ign-bdforet-v2 (5 September 2026) |
Three reference days, the caveat
| rise | set | sun | day | |
|---|---|---|---|---|
| 21 June | 06:42 | 21:40 | 15.0 h | 16.2 h |
| 20 September | 08:35 | 19:32 | 10.9 h | 12.3 h |
| 21 December | 09:49 | 16:08 | 6.3 h | 8.2 h |
Computed from the IGN elevation model at 5 m: horizon in 36 directions up to six kilometres, sun position per minute, angle of incidence on the mean slope. Clear sky, with the tree canopy from the IGN forest inventory as a raised horizon (15 m closed forest, 5 m heath, trees within 60 m ignored), 38% of the far field is forest (BD Forêt), no buildings.
Air and cold
20 m
above the lowest point
drains away
cold air
a gully
2.0 ha flows past
| Cold air | 20 m above the hollow, cold air drains awayign-rge-alti (5 September 2026) |
|---|---|
| Cold air passing through | 2.0 ha a gully, mean over the polygon 0.16 haign-rge-alti (5 September 2026) |
Planting
E-W
down the slope
1.53 m
between the rows
98%
vineyard in 1950
| Rows | E-W (100°) down the slope (2°), every 1.53 m, varies by plotmeasured over 2.8 of 3.8 ha plantedign-bdortho (6 September 2026) |
|---|---|
| Vineyard in 1950 | 98% planted since: 0.04 haassessed over 2.4 ha on the 1950-1965 aerial photographign-photos-historiques-1950-1965 (6 September 2026) |
Climate over time
station CHAMBRECY-CIVC, 150 m, 13.7 km away
raw daily series, not corrected for station breaks
The name
- sur
- above or below something else: sur le chemin, sous le bois. Shape and position · Terroirium, Eigen telling over de namen in deze atlas (2026)
This is about the words, not about this plot: the same name can have arisen differently elsewhere.
Who owns land here
0.54 ha of 3.95 ha delimited is registered to a legal entity
- LGMT8%
- REMI-VINCENT4%
- BND 346AK259 LES COPROPRIETAIRES1%
- COMMUNE DE MAREUIL LE PORT1%
- private individuals or unknown86%
- 0.30 ha LGMT SAS · other
- 0.17 ha REMI-VINCENT SAS · other
- 0.05 ha BND 346AK259 LES COPROPRIETAIRES AUPM · other
- 0.02 ha COMMUNE DE MAREUIL LE PORT COM · public
Private individuals or unknown: 3.41 ha.
Share of the delimited hectares. Only legal entities are public in France; everything else stays unnamed. From the public register of legal entities (DGFiP), as of 1 January 2025. The owner is not always the one who works the vineyard: tenancy is common.
Nearby lieux-dits
- Le Mornas Champagne · 200 m
- La Rosière Champagne · 250 m
- Les Malermes Champagne · 300 m
- Les Douzes Deniers Champagne · 300 m
- Le Bondy Champagne · 400 m
- Les Grands Peres Champagne · 450 m
- Les Six Hommées Champagne · 450 m
- Les Vingt Verges Champagne · 450 m
In the same village, measured between label points. That does not say which ones border each other; the map shows that.
Where each figure comes from
- Classification
- The INAO delimitation per denomination, cut against the cadastral parcel. Only the INAO's own plans are legally binding; this map is informational.
- Area
- Computed on the sphere from longitude and latitude (turf.area), not in Lambert-93. For an appellation this is the union of the INAO polygons across commune boundaries, measured on the unclosed geometry; the fifteen metres used to close the outline for the map are not counted. For a climat it is the union of the cadastral lieu-dit polygons with that name.
- Planted
- Parcel area times vineyard cover, where cover comes from the IGN vegetation layer supplemented by the agricultural declaration. Checked against the customs harvest declarations: median deviation 5.1 per cent over a hundred appellations.
- Elevation
- Mean of the elevation-model cells whose centre falls inside the polygon, on a 5 m grid.
- Slope
- Per-cell slope from the elevation model using Horn's method, then averaged over the cells in the polygon.
- Aspect
- Vector mean of the per-cell aspect. A plain average would turn north-east and north-west into south.
- Sun at harvest
- Hours of direct sun on 20 September under a clear sky, with the horizon in 36 directions out to six kilometres and the height of woods and buildings on top of it. Canopy height is measured where LiDAR HD covers the area and estimated from BD Forêt where it does not; the panel states which of the two was used.
- Grape variety by appellation
- Per appellation and colour the permitted varieties from the approved cahier des charges; per appellation and tier the declared hectares of white and red from the customs harvest declaration (product codes). One colour permitted: the main variety of that colour. Two colours: from 85 percent of the hectares that colour applies, in between it is called mixed. Champagne: the dominant variety from the planted hectares per variety per commune from FranceAgriMer. Per polygon the dominant variety of its parts by area. Derived, not measured: the variety per plot exists only in the customs vineyard register, which is not public. In a two-colour appellation a single plot may carry the other variety. Customs withhold small appellations (statistical secrecy), in which case the split is missing.
- Bedrock
- The geological unit covering the largest share of the polygon, from the 1:50,000 geological map. At 1:50,000 the map separates one climat from another, but not what varies inside a climat.
- Organic
- Share of the area certified organic or in conversion, from the CartoBio plot register.