空间ETL流水线 | Spatial ETL Pipeline

Config-driven spatial ETL (Extract-Transform-Load) pipeline:

• Extract: extracts a GeoDataFrame from synthetic data or a local vector file.
• Transform: executes composable operators in config order — filter_bbox (window filter), filter_attribute (attribute comparison filter supporting 6 comparison operators such as >/</==), reproject (reprojection), add_field (derived columns: area / perimeter / centroid / sequence number), rename (field renaming), buffer (buffering).
• Load: writes out GeoJSON or GeoPackage.

Each step records structured logs (step name, duration, input/output feature counts, status), and a quality report (feature gain/loss, retention rate, null-value ratio, invalid geometry count, CRS) is aggregated at the end. Any pipeline can be customized by supplying a JSON config via --config. --synthetic mode generates random polygons and runs the default pipeline.

Dependencies / 依赖

pip install numpy rasterio geopandas shapely fiona pyproj

Usage / 使用方法

Basic Usage

python geoskill-spatial-etl-pipeline.py --bbox 116.0 39.0 117.0 40.0 --synthetic --output-dir ./out

Example 1 (Synthetic Data, Default Pipeline, Offline)

python geoskill-spatial-etl-pipeline.py --bbox 116.0 39.0 117.0 40.0 --synthetic --features 60 --output-dir ./etl

Example 2: Custom Configuration (Filter + Reprojection + Buffer)

python geoskill-spatial-etl-pipeline.py --config pipeline.json --output-dir ./custom

Example configuration pipeline.json:

{
  "source": {"type": "file", "path": "raw.geojson"},
  "steps": [
    {"op": "filter_attribute", "field": "value", "cmp": ">", "value": 10},
    {"op": "reproject", "to_crs": "EPSG:3857"},
    {"op": "buffer", "distance": 100}
  ],
  "load": {"format": "gpkg", "path": "out.gpkg"}
}

Example 3: Area Derivation on Real Files

python geoskill-spatial-etl-pipeline.py --input parcels.shp --output-dir ./area

Example 4: Synthetic + Large Sample

python geoskill-spatial-etl-pipeline.py --bbox 121.0 31.0 122.0 32.0 --synthetic --features 200 --output-dir ./etl2 --quiet

Example 5: Small-Area Pipeline

python geoskill-spatial-etl-pipeline.py --bbox 116.39 39.90 116.40 39.91 --synthetic --features 30 --output-dir ./tiny

Output / 输出

Data Source / 数据源 / Source

• --input: local vector file
• --config: JSON config (can point to any source)
• --synthetic: generates random polygons locally

Privacy / 隐私声明 / Privacy

• Runs offline by default; --synthetic mode requires no network at all.
• All processing is done locally; no user data is uploaded.

License / License

MIT

name: geoskill-spatial-etl-pipeline description: '配置驱动的提取-转换-加载流水线，含分步日志与质量报告。Config-driven extract-transform-load pipeline with per-step logging and a quality report.'

空间ETL流水线 | Spatial ETL Pipeline

配置驱动的空间 ETL（Extract-Transform-Load）流水线：

• Extract：从合成数据或本地矢量文件提取 GeoDataFrame。
• Transform：按配置顺序执行可组合算子——filter_bbox（窗口过滤）、 filter_attribute（属性比较过滤，支持 >/</== 等 6 种比较符）、 reproject（重投影）、add_field（面积/周长/质心/序号派生列）、 rename（字段重命名）、buffer（缓冲）。
• Load：写出 GeoJSON 或 GeoPackage。

每个步骤记录结构化日志（步骤名、耗时、输入/输出要素数、状态），结束后 汇总质量报告（要素增减、保留率、空值比例、无效几何数、CRS）。用 --config 提供 JSON 配置即可自定义任意流水线。--synthetic 模式生成 随机多边形跑默认流水线。

依赖

pip install numpy rasterio geopandas shapely fiona pyproj

使用方法

基本用法

python geoskill-spatial-etl-pipeline.py --bbox 116.0 39.0 117.0 40.0 --synthetic --output-dir ./out

示例 1（合成数据，默认流水线，离线）

python geoskill-spatial-etl-pipeline.py --bbox 116.0 39.0 117.0 40.0 --synthetic --features 60 --output-dir ./etl

示例 2：自定义配置（过滤 + 重投影 + 缓冲）

python geoskill-spatial-etl-pipeline.py --config pipeline.json --output-dir ./custom

配置示例 pipeline.json：

{
  "source": {"type": "file", "path": "raw.geojson"},
  "steps": [
    {"op": "filter_attribute", "field": "value", "cmp": ">", "value": 10},
    {"op": "reproject", "to_crs": "EPSG:3857"},
    {"op": "buffer", "distance": 100}
  ],
  "load": {"format": "gpkg", "path": "out.gpkg"}
}

示例 3：对真实文件做面积派生

python geoskill-spatial-etl-pipeline.py --input parcels.shp --output-dir ./area

示例 4：合成 + 大样本

python geoskill-spatial-etl-pipeline.py --bbox 121.0 31.0 122.0 32.0 --synthetic --features 200 --output-dir ./etl2 --quiet

示例 5：小范围流水线

python geoskill-spatial-etl-pipeline.py --bbox 116.39 39.90 116.40 39.91 --synthetic --features 30 --output-dir ./tiny

输出

数据源 / Source

• --input：本地矢量文件
• --config：JSON 配置（可指向任意源）
• --synthetic：本地生成随机多边形

隐私声明 / Privacy

• 默认离线运行，--synthetic 模式完全无网络。
• 所有处理在本地完成，不上传用户数据。

License

MIT