Lieu-dit · Crézancy
Le Fond de Launay
Le Fond de Launay is a lieu-dit in Crézancy, Vallée de la Marne, Champagne, whose largest tier is champagne.
4.25 ha
delimited
100 m
elevation
11.2 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 | Crézancy |
| Region | Vallée de la Marne, Champagne |
| Delimited | 4.25 hainao-aoc-viticoles-bulk (not in this commune) · cadastre-etalab (4 September 2026) |
| Planted | 4.11 hacadastre-etalab (4 September 2026) · ign-bdtopo-vigne (4 September 2026) · ign-rpg-2024 (5 September 2026) |
| Parcels | 14 |
| Grape variety | meunier 37 %, chardonnay 33 %, pinot noir 30 % 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 13 named plots ranked champagne in Crézancy, from high to low:
Position
100 m
elevation
15.8%
steep
SSW
south-southwest
mid-slope
concave fold
| Elevation | 100 m 90 to 113 mign-rge-alti (5 September 2026) |
|---|---|
| Slope | 15.8% 9.0°ign-rge-alti (5 September 2026) |
| Aspect | south-southwest 205°ign-rge-alti (5 September 2026) |
| On the slope | 23% mid slope, in a concave hollow, 744 m drains onto itign-rge-alti (5 September 2026) |
Bedrock
- 35%Lutetian limestone, undifferentiated 47.8–41.2 million years
- 65%Ypresian sand, sandstone and conglomerate 56–48 million years
Not a borehole: ordered by age, thickness by share of surface.
In the glass. Tends towards lighter, early-ripening wines with supple tannin and an open, fragrant style. How much of that really comes from the sand cannot be separated from planting density, yield and the age of the vines.
Lower Eocene, roughly 56 to 48 million years old. These are deposits of rivers, alluvial fans and lakes on the southern edge of the Paris Basin: loose quartz sands, locally cemented into hard sandstone beds, with gravel layers and conglomerate full of reworked flint from the older chalk. In the ground it is a granular, rust-brown to ochre-yellow mass without solid rock, with clayey interlayers that can appear and disappear again over short distances.
For the vine. Sand drains quickly and generally warms up promptly in spring, which can get root growth going early; whether ripening really runs ahead also depends on aspect, soil depth and yield. Active lime is virtually absent, so chlorosis is rarely an issue here, but the water supply is small: a dry summer is felt immediately unless the roots reach a clay layer or the limestone beneath. Because the water drains away anyway, a steep slope is not needed for drainage; many of these plots therefore lie flat, and on flat terrain cold air lingers, with a real risk of late spring frost.
In Bourgogne mainly as a Tertiary cover on the plateaux and along the western edge of the Bresse, in the Chalonnais and the Mâconnais.
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: e4b, e5.
brgm-bdcharm50 (4 September 2026)Sun and horizon
08:27
above the hill
19:41
behind the hill
11.2 h
sun at harvest
0.7 h
lost to the hill
Grey: sun up, but behind the hill or the vineyard's own slope.
Around harvest the sun rises here at 08:27 above the hill and disappears at 19:41 behind the hill: 11.2 hours of direct sun on a clear day. The ridge reaches 16.3° above the horizon to the north-northeast. The relief costs 0.5% of the irradiation from April to October, direct and diffuse together.
| Irradiation | +3.0% versus flat land 1,014 kWh/m² from April to October, 45% 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 | 98.5% 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 and the caveat
| rise | set | sun | day | |
|---|---|---|---|---|
| 21 June | 07:11 | 21:35 | 14.4 h | 16.2 h |
| 20 September | 08:27 | 19:41 | 11.2 h | 12.3 h |
| 21 December | 09:44 | 16:17 | 6.5 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), 36% of the far field is forest (BD Forêt), no buildings.
The irradiation loss does include clouds: the average of 2005 to 2023 (PVGIS-SARAH3, EU JRC), not any particular year.
Air and cold
28 m
above the lowest point
drains far away
cold air
a gully
5.3 ha flows past
| Cold air | 28 m high on the slope, cold air drains far awayign-rge-alti (5 September 2026) |
|---|---|
| Cold air passing through | 5.3 ha a gully, mean over the polygon 0.46 haign-rge-alti (5 September 2026) |
Planting
NE-SW
down the slope
1.23 m
between the rows
100%
vineyard in 1950
| Rows | NE-SW (34°) down the slope (9°), every 1.23 m, slightly fannedmeasured over 4.0 of 4.1 ha plantedign-bdortho (6 September 2026) |
|---|---|
| Vineyard in 1950 | 100%assessed over 4.0 ha on the 1950-1965 aerial photographign-photos-historiques-1950-1965 (6 September 2026) |
Climate over time
station CHATILLON-CIVC, 153 m, 18.7 km away
raw daily series, not corrected for station breaks
The name
- fond
- the bottom of a valley or the lowest part of a plot. Shape and position · Gérard Taverdet, Noms de lieux de Bourgogne (2007)
This is about the words, not about this plot: the same name can have arisen differently elsewhere.
Who owns land here
0.52 ha of 4.25 ha delimited is registered to a legal entity
- CHAMPAGNE A ROBERT12%
- private individuals or unknown88%
- 0.52 ha CHAMPAGNE A ROBERT SC · land company · organic
Private individuals or unknown: 3.73 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
- Au-Dessus des Rues de Parroy Champagne · 250 m
- Les Ardennes Champagne · 250 m
- Le Four a Chaux Champagne · 250 m
- Saint-Blaise Champagne · 250 m
- La Michelette Champagne · 400 m
- Le Plaisir Champagne · 450 m
- Les Jaunettes Champagne · 500 m
- L'Homme Mort Champagne · 700 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.