Spatial Analysis · P1

Catchment Study

Travel-time catchments and the population inside them.

Yangma Island Tourism Resort · Muping · Yantai 100 m population grid · 1 km age-gender structure Oval_Adam October 2026

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空间分析 · P1

CATCHMENT STUDY

等时圈研究

以 15 / 30 / 45 分钟车程为界,读出场地可触达的人群规模与结构。

烟台 · 牟平 · 养马岛旅游度假区 100 m 人口格网 · 1 km 年龄‑性别结构 Oval_Adam 2026 年 10 月

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At a glance

What the catchment holds

SummaryWithin 15 minutes the site reaches only itself: the island and its bridge, 28,000 people. The moment the catchment touches the mainland coast the pool grows by an order of magnitude — 0.67 M at 30 minutes, 1.53 M at 45 — and the population gets markedly younger.

1.53 Mpeople within the 45-min catchment · 1,071 km²

0.67 Mwithin the 30-min catchment · 270 km²

28,300within the 15-min catchment · 31 km²

49.7%male share · median age 43.7 – 52.8

By catchment

Catchment	Area (km²)	Population	Male share	Median age
15 min	30.9	28,322	49.6%	52.8
30 min	270.4	673,137	49.6%	44.7
45 min	1,070.8	1,534,986	49.8%	43.7

The site is offshore, so the catchments are land-limited: 15 minutes is the island and its bridge; 30 and 45 minutes run along the Muping and Yantai coast.

关键数字

等时圈里有什么

小结15 分钟只够触到场地自身 —— 全岛与跨海桥,约 2.8 万人。等时圈一旦触及对岸海岸,人口体量跃升一个量级:30 分钟 67 万,45 分钟 153 万,且人群明显年轻化。

153 万45 分钟等时圈内人口 · 1,071 km²

67 万30 分钟等时圈内 · 270 km²

2.83 万15 分钟等时圈内 · 31 km²

49.7%男性占比 · 中位年龄 43.7 – 52.8

分圈层

等时圈	面积(km²)	人口	男性占比	中位年龄
15 分钟	30.9	28,322	49.6%	52.8
30 分钟	270.4	673,137	49.6%	44.7
45 分钟	1,070.8	1,534,986	49.8%	43.7

站点位于海上,等时圈受岸线限制:15 分钟为全岛与跨海桥;30、45 分钟沿海岸进入牟平与烟台城区。

Region

Population heatmap

SummaryPopulation sits in ribbons along the coast, not in a single mass. The 45-min catchment of 1.53 million people is spread thin across 1,071 km², with the densest cells in the Muping and Yantai urban strip; the island itself reads as an almost empty stage against it.

Resident population · people per 100 m cell 0163 White → red = low → high.

区域

人口热力图

小结人口沿滨海呈带状分布,而不是聚成一团。45 分钟等时圈内 153 万人分散在 1,071 km² 上,最密的格网集中在牟平与烟台城区带;与之相对,岛上几乎是空场。

常住人口 · 每 100 m 格网人数 0163 白 → 红 = 低 → 高。

Site focus

Population heatmap — site focus

SummaryThe nearest catchment is the emptiest and the oldest. Inside 15 minutes the site reaches 28,300 people over 31 km² — about 900 per km², an order of magnitude below the mainland. Everything the island can reach on its own is its own residents and visitors.

Resident population · people per 100 m cell 0136 White → red = low → high.

场地聚焦

人口热力图 — 场地聚焦

小结最近的圈层最空、也最老。15 分钟内场地只触到 2.83 万人、31 km²,约 900 人/km²,比对岸低一个量级。岛上自身能触达的,基本就是岛上的人。

常住人口 · 每 100 m 格网人数 0136 白 → 红 = 低 → 高。

Gender

Gender ratio

SummaryThis is a balanced population, not a migrant one. Male share is 49.6 – 49.8% in every catchment — effectively parity across 1.5 million people, with only faint local skew. It reads as settled local households rather than a workforce in-migration profile.

Female share of population, Yangma Island — **Female share** · 1 km age-gender grid.

Female share of population 40%60% White = 40% · full red = 60%.

性别

性别比

小结这是均衡型人口,不是移民型人口。三个圈层男性占比均为 49.6 – 49.8%,150 万人尺度上几乎完全持平,仅有轻微局部偏斜 —— 更像本地常住家庭,而非外来务工集中区。

女性人口占比 40%60% 白 = 40%,满红 = 60%。

Age structure

Population by age group

SummaryThe age profile is a function of reach, not of the place. The 15-min ring — the island alone — is old: 45–64 makes up 39% and the median age is 52.8. Reaching the mainland drops the median by eight years to 44.7 at 30 minutes and 43.7 at 45, with 15–44 filling in.

Population structure by age and gender, for the 15, 30 and 45 minute catchments — **Age and gender structure.** Catchments: 15 / 30 / 45 min · share of each catchment's population.

年龄结构

人口年龄结构

小结年龄结构取决于"能走多远",而非地方本身。15 分钟环即全岛,明显偏老:45–64 岁占 39%,中位年龄 52.8。等时圈触及大陆后,中位年龄一次下降约 8 岁 —— 30 分钟 44.7、45 分钟 43.7,15–44 岁人口补位。

各等时圈人口年龄与性别结构 — **年龄与性别结构。**等时圈:15 / 30 / 45 分钟 · 占各等时圈人口的比例。

Sources & notes

Sources and notes

Method

Catchments are travel-time isochrones at 15, 30 and 45 minutes, measured from a single site origin — Yangma Island Tourism Resort, 37.4659 N, 121.6206 E (WGS84).
Population is read from WorldPop 2026 R2025A on a 100 m grid; a cell is counted when its centre falls inside a catchment.
Age and gender come from the WorldPop 1 km age-gender structure; female share is calculated only where population exists.

Sources

Population and age-gender: WorldPop 2026 R2025A (modelled) · CC-BY 4.0
Travel-time catchments: Mapbox driving-traffic
Basemap: Esri World Light Gray Canvas / World Imagery

Notes

Population figures are modelled estimates rather than a census count; read them as orders of magnitude.
Travel times are estimates under typical conditions, not observed journey times.
The site is offshore, so catchments are land-limited: the 15-min ring is the island and its bridge.

来源与说明

方法

等时圈为 15 / 30 / 45 分钟车程的等时线,自同一场地原点量取 —— 养马岛旅游度假区,37.4659 N, 121.6206 E(WGS84)。
人口取自 WorldPop 2026 R2025A,100 m 格网;格网中心点落入等时圈内即计入。
年龄与性别取自 WorldPop 1 km 年龄‑性别结构;女性占比仅在有人口的格网内计算。

来源

人口与年龄‑性别:WorldPop 2026 R2025A(模型数据)· CC-BY 4.0
车程等时圈:Mapbox driving-traffic
底图:Esri World Light Gray Canvas / World Imagery

说明

人口为模型估算值,非普查数据,请按数量级理解。
车程为常规路况下的估算值,非实测通勤时间。
站点位于海上,等时圈受岸线限制;15 分钟环即全岛与跨海桥。