官方服务:
资源简介:
Number of primary schools in Poland from 1990 to 2024
应用场景:
相关数据集
Rail Line Historic
Historical rail lines in Iowa. The Data_Year field allows viewing of various year historical data for each rail line segment.
Iowadot Open Data2026-07-09 更新60
The 18th century Cassini roads and cities dataset
The evolution of infrastructure networks such as roads and streets are of utmost importance to understand the evolution of urban systems. However, datasets describing these spatial objects are rare an
NIAID Data Ecosystem60
亚美尼亚 家庭电话数量
家庭电话数量在12-01-2024达235.400千单位,相较于12-01-2023的260.300千单位有所下降。家庭电话数量数据按年更新,12-01-1995至12-01-2024期间平均值为545.200千单位,共30份观测结果。该数据的历史最高值出现于12-01-2008,达552.700千单位,而历史最低值则出现于12-01-2024,为235.400千单位。CEIC提供的家庭电话数量数
CEIC Data40
Shapefile of railways in North America between 1960 and 1980
Shapefile of railways in North America between 1960 and 1980 based on historical cartography of different libraries. Shapefiles each 20 years because of the impossibility of finding historical cartogr
DataCite Commons2026-04-24 更新60
Infrastructure Development and Ice Wedge Thermokarst Formation in Point Lay (Kali), Alaska between 1949 and 2019
This dataset documents changes in infrastructure development and associated ice wedge thermokarst formation in Point Lay (Kali), Alaska, between 1949 and 2020. The data include vector-based Geographic
DataONE2025-05-19 更新50



