Area and Population Estimates from Sentinel Data - Ghana and Mediterranean Egypt

This dataset contains the area and population predictions made in the paper "A Method for Creating Globally Applicable Models for Population Estimates from Sentinel Data". The predictions are made using Sentinel 1 and 2 data and the newest available census data and population forecasts. The individual datasets are:

ghana_area_float32.tif & egypt_area_float32.tif
The predicted area of structures per pixel.
Spatial Resolution: 10x10m
Data format: float32
Valid for: 2021 Q3 Ghana, 2021 Q4 Egypt
Nodata: -9999.0

ghana_area_uint8.tif & egypt_area_uint8.tif
The predicted area of structures per pixel. Each pixel is 10x10m. The data format is uint8, rounded to the nearest integer from float32.
Spatial Resolution: 10x10m
Data format: uint8
Valid for: 2021 Q3 Ghana, 2021 Q4 Egypt
Nodata: 255

ghana_population_unweighted.tif & egypt_population_unweighted.tif
These are the unweighted population predictions for Ghana and Egypt. Unweighted means that daytime and nighttime population has not been taken into account, and each m2 of structure is weighted equally.
Spatial Resolution: 10x10m
Data format: float32
Valid for: 2021 Q3 Ghana, 2020 Q4 Egypt
Nodata: -9999.0

ghana_population_unweighted_100m.tif & egypt_population_unweighted_100m.tif
These are the same as ghana_population_unweighted.tif & egypt_population_unweighted.tif, but resampled to 100x100m using the SUM.
Spatial Resolution: 100x100m
Data format: float32
Valid for: 2021 Q3 Ghana, 2020 Q4 Egypt
Nodata: -9999.0

ghana_area_residential.tif & ghana_area_non-residential.tif & ghana_area_residential_selforganised.tif
This is the predicted area in m2 of the three classes: Residential, non-residential, and self-organised. It can be used to convert the area to a temporally adjusted population estimate as described in the paper.
Spatial Resolution: 10x10m
Data format: float32
Valid for: 2021 Q3 Ghana
Nodata: -9999.9

ghana_m2_pr_person_conversion_layer.tif & egypt_m2_pr_person_conversion_layer.tif
This is the predicted area pr person according to the most recent census and forecasts for each country. It can be used to convert from area to population. The Ghana numbers are based on ghana_area_float32 and the Ghana census 2021. Egypt's numbers are based on egypt_area_float32 and Egypt's 2017 census and UN population forecasts. The borders are smoothed with a 2km round kernel, but the sum is adjusted to remain the same.
Spatial Resolution: 10x10m
Data format: float32
Valid for: 2021 Q3 Ghana, 2020 Q4 Egypt
Nodata: -9999.0

本数据集包含了论文《一种基于哨兵数据创建全球适用性人口估计模型的方案》中所提出的区域及人口预测数据。预测基于哨兵1号和2号数据，以及最新可用的普查数据和人口预测。具体数据集包括：

ghana_area_float32.tif & egypt_area_float32.tif
该数据集预测了每个像素的结构面积。
空间分辨率：10x10米
数据格式：float32
适用范围：2021年第三季度加纳，2021年第四季度埃及
无效值：-9999.0

ghana_area_uint8.tif & egypt_area_uint8.tif
该数据集预测了每个像素的结构面积。每个像素尺寸为10x10米。数据格式为uint8，由float32四舍五入至最接近的整数。
空间分辨率：10x10米
数据格式：uint8
适用范围：2021年第三季度加纳，2021年第四季度埃及
无效值：255

ghana_population_unweighted.tif & egypt_population_unweighted.tif
此为加纳和埃及的无加权人口预测。无加权表示未考虑白天和夜间人口，且每个平方米的结构面积均等加权。
空间分辨率：10x10米
数据格式：float32
适用范围：2021年第三季度加纳，2020年第四季度埃及
无效值：-9999.0

ghana_population_unweighted_100m.tif & egypt_population_unweighted_100m.tif
与ghana_population_unweighted.tif & egypt_population_unweighted.tif相同，但通过SUM重采样至100x100米。
空间分辨率：100x100米
数据格式：float32
适用范围：2021年第三季度加纳，2020年第四季度埃及
无效值：-9999.0

ghana_area_residential.tif & ghana_area_non-residential.tif & ghana_area_residential_selforganised.tif
此为预测的平方米面积，分为三类：住宅、非住宅和自组织。可用于将面积转换为根据论文所述的时间调整后的人口估计。
空间分辨率：10x10米
数据格式：float32
适用范围：2021年第三季度加纳
无效值：-9999.9

ghana_m2_pr_person_conversion_layer.tif & egypt_m2_pr_person_conversion_layer.tif
此为根据各国最新的普查和预测数据，预测的每人平方米面积。可用于将面积转换为人口。加纳数据基于ghana_area_float32和2021年加纳普查，埃及数据基于egypt_area_float32和2017年埃及普查及联合国人口预测。边界通过2公里圆形核平滑处理，但总和已调整以保持一致。
空间分辨率：10x10米
数据格式：float32
适用范围：2021年第三季度加纳，2020年第四季度埃及
无效值：-9999.0