| Name | area-splitter JSON |
| Version |
3.0.0
JSON |
| download |
| home_page | None |
| Summary | A utility for splitting an AOI into multiple tasks. |
| upload_time | 2025-09-15 10:35:24 |
| maintainer | None |
| docs_url | None |
| author | None |
| requires_python | >=3.10 |
| license | None |
| keywords |
aoi
field-tm
hot
postgis
split
|
| VCS |
 |
| bugtrack_url |
|
| requirements |
No requirements were recorded.
|
| Travis-CI |
No Travis.
|
| coveralls test coverage |
No coveralls.
|
# Area Splitter
<!-- markdownlint-disable -->
<p align="center">
<img src="https://raw.githubusercontent.com/hotosm/field-tm/main/docs/images/hot_logo.png" style="width: 200px;" alt="HOT"></a>
</p>
<p align="center">
<em>A utility for splitting an AOI into multiple tasks.</em>
</p>
<p align="center">
<a href="https://pypi.org/project/area-splitter" target="_blank">
<img src="https://img.shields.io/pypi/v/area-splitter?color=%2334D058&label=pypi%20package" alt="Package version">
</a>
<a href="https://pypistats.org/packages/area-splitter" target="_blank">
<img src="https://img.shields.io/pypi/dm/area-splitter.svg" alt="Downloads">
</a>
<a href="https://github.com/hotosm/field-tm/blob/main/src/backend/packages/area-splitter/LICENSE.md" target="_blank">
<img src="https://img.shields.io/badge/license-GPL%203.0-orange.svg" alt="License">
</a>
</p>
---
📖 **Documentation**: <a href="https://hotosm.github.io/fmtm-splitter/" target="_blank">https://hotosm.github.io/fmtm-splitter/</a>
🖥️ **Source Code**: <a href="https://github.com/hotosm/field-tm/blob/main/src/backend/packages/area-splitter" target="_blank">https://github.com/hotosm/field-tm/blob/main/src/backend/packages/area-splitter</a>
---
<!-- markdownlint-enable -->
This is a program to split polygons into tasks using a variety of
algorithms. It is a class that can be used by other projects, but also
a standalone program. It was originally developed for the
[FMTM](https://github.com/hotosm/fmtm/wiki) project, but then
converted so it can be used by multiple projects.
The class takes GeoJson Polygon as an input, and returns a GeoJson
file Multipolygon of all the task boundaries.
## Installation
```bash
pip install area-splitter
```
> Note Postgis should have SFCGAL enabled:
>
> ```sql
> CREATE EXTENSION IF NOT EXISTS postgis_sfcgal WITH SCHEMA public;
> ```
## Splitting Types
### Split By Square
The default is to split the polygon into squares. The default
dimension is 50 meters, but that is configurable. The outer square are
clipped to the AOI boundary.
### Split By Feature
The split by feature uses highway data extracted from OpenStreetMap,
and uses it to generate non square task boundaries. It can also be
adjusted to use the number of buildings in a task to adjust it's
size.
### Custom SQL query
It is also possible to supply a custom SQL query to generate the
tasks.
## Usage In Code
- Either the FMTMSplitter class can be used directly, or the wrapper/
helper functions can be used for splitting.
By square:
```python
import json
from area_splitter.splitter import split_by_square
aoi = json.load("/path/to/file.geojson")
split_features = split_by_square(
aoi,
meters=100,
)
```
The FMTM splitter algorithm:
```python
import json
from area_splitter.splitter import split_by_sql
aoi = json.load("/path/to/file.geojson")
osm_extracts = json.load("/path/to/file.geojson")
db = "postgresql://postgres:postgres@localhost/postgres"
split_features = split_by_sql(
aoi,
db,
num_buildings=50,
osm_extract=osm_extracts,
)
```
### Database Connections
- The db parameter can be a connection string to start a new connection.
- Or an existing database connection can be reused.
- To do this, either the psycopg2 connection, or a DBAPI connection string
must be passed:
psycopg2 example:
```python
import psycopg2
from area_splitter.splitter import split_by_sql
db = psycopg2.connect("postgresql://postgres:postgres@localhost/postgres")
split_features = split_by_sql(
aoi,
db,
num_buildings=50,
osm_extract=osm_extracts,
)
```
## Usage Via CLI
Options:
```bash
-h, --help show this help message and exit
-v, --verbose verbose output
-o OUTFILE, --outfile OUTFILE Output file from splitting
-m METERS, --meters METERS Size in meters if using square splitting
-b BOUNDARY, --boundary BOUNDARY Polygon AOI
-s SOURCE, --source SOURCE Source data, Geojson or PG:[dbname]
-c CUSTOM, --custom CUSTOM Custom SQL query for database
```
This program splits a Polygon (the Area Of Interest)
The data source for existing data can'be either the data extract
used by the XLSForm, or a postgresql database.
Examples:
```bash
area-splitter -b AOI
area-splitter -v -b AOI -s data.geojson
area-splitter -v -b AOI -s PG:colorado
# Where AOI is the boundary of the project as a polygon
# And OUTFILE is a MultiPolygon output file,which defaults to fmtm.geojson
# The task splitting defaults to squares, 50 meters across
```
Raw data
{
"_id": null,
"home_page": null,
"name": "area-splitter",
"maintainer": null,
"docs_url": null,
"requires_python": ">=3.10",
"maintainer_email": null,
"keywords": "aoi, field-tm, hot, postgis, split",
"author": null,
"author_email": "Ivan Gayton <ivan.gayton@hotosm.org>, Rob Savoye <rob.savoye@hotosm.org>, Sam Woodcock <sam.woodcock@hotosm.org>, Sujan Adhikari <adhikarisujan.naxa@gmail.com>",
"download_url": "https://files.pythonhosted.org/packages/41/73/f0b653696d1aaa59738880409009b40192d6bfa16053915fc2d2449914fa/area_splitter-3.0.0.tar.gz",
"platform": null,
"description": "# Area Splitter\n\n<!-- markdownlint-disable -->\n<p align=\"center\">\n <img src=\"https://raw.githubusercontent.com/hotosm/field-tm/main/docs/images/hot_logo.png\" style=\"width: 200px;\" alt=\"HOT\"></a>\n</p>\n<p align=\"center\">\n <em>A utility for splitting an AOI into multiple tasks.</em>\n</p>\n<p align=\"center\">\n <a href=\"https://pypi.org/project/area-splitter\" target=\"_blank\">\n <img src=\"https://img.shields.io/pypi/v/area-splitter?color=%2334D058&label=pypi%20package\" alt=\"Package version\">\n </a>\n <a href=\"https://pypistats.org/packages/area-splitter\" target=\"_blank\">\n <img src=\"https://img.shields.io/pypi/dm/area-splitter.svg\" alt=\"Downloads\">\n </a>\n <a href=\"https://github.com/hotosm/field-tm/blob/main/src/backend/packages/area-splitter/LICENSE.md\" target=\"_blank\">\n <img src=\"https://img.shields.io/badge/license-GPL%203.0-orange.svg\" alt=\"License\">\n </a>\n</p>\n\n---\n\n\ud83d\udcd6 **Documentation**: <a href=\"https://hotosm.github.io/fmtm-splitter/\" target=\"_blank\">https://hotosm.github.io/fmtm-splitter/</a>\n\n\ud83d\udda5\ufe0f **Source Code**: <a href=\"https://github.com/hotosm/field-tm/blob/main/src/backend/packages/area-splitter\" target=\"_blank\">https://github.com/hotosm/field-tm/blob/main/src/backend/packages/area-splitter</a>\n\n---\n\n<!-- markdownlint-enable -->\n\nThis is a program to split polygons into tasks using a variety of\nalgorithms. It is a class that can be used by other projects, but also\na standalone program. It was originally developed for the\n[FMTM](https://github.com/hotosm/fmtm/wiki) project, but then\nconverted so it can be used by multiple projects.\n\nThe class takes GeoJson Polygon as an input, and returns a GeoJson\nfile Multipolygon of all the task boundaries.\n\n## Installation\n\n```bash\npip install area-splitter\n```\n\n> Note Postgis should have SFCGAL enabled:\n>\n> ```sql\n> CREATE EXTENSION IF NOT EXISTS postgis_sfcgal WITH SCHEMA public;\n> ```\n\n## Splitting Types\n\n### Split By Square\n\nThe default is to split the polygon into squares. The default\ndimension is 50 meters, but that is configurable. The outer square are\nclipped to the AOI boundary.\n\n### Split By Feature\n\nThe split by feature uses highway data extracted from OpenStreetMap,\nand uses it to generate non square task boundaries. It can also be\nadjusted to use the number of buildings in a task to adjust it's\nsize.\n\n\n\n### Custom SQL query\n\nIt is also possible to supply a custom SQL query to generate the\ntasks.\n\n## Usage In Code\n\n- Either the FMTMSplitter class can be used directly, or the wrapper/\n helper functions can be used for splitting.\n\nBy square:\n\n```python\nimport json\nfrom area_splitter.splitter import split_by_square\n\naoi = json.load(\"/path/to/file.geojson\")\n\nsplit_features = split_by_square(\n aoi,\n meters=100,\n)\n```\n\nThe FMTM splitter algorithm:\n\n```python\nimport json\nfrom area_splitter.splitter import split_by_sql\n\naoi = json.load(\"/path/to/file.geojson\")\nosm_extracts = json.load(\"/path/to/file.geojson\")\ndb = \"postgresql://postgres:postgres@localhost/postgres\"\n\nsplit_features = split_by_sql(\n aoi,\n db,\n num_buildings=50,\n osm_extract=osm_extracts,\n)\n```\n\n### Database Connections\n\n- The db parameter can be a connection string to start a new connection.\n- Or an existing database connection can be reused.\n- To do this, either the psycopg2 connection, or a DBAPI connection string\n must be passed:\n\npsycopg2 example:\n\n```python\nimport psycopg2\nfrom area_splitter.splitter import split_by_sql\n\ndb = psycopg2.connect(\"postgresql://postgres:postgres@localhost/postgres\")\n\nsplit_features = split_by_sql(\n aoi,\n db,\n num_buildings=50,\n osm_extract=osm_extracts,\n)\n```\n\n## Usage Via CLI\n\nOptions:\n\n```bash\n-h, --help show this help message and exit\n-v, --verbose verbose output\n-o OUTFILE, --outfile OUTFILE Output file from splitting\n-m METERS, --meters METERS Size in meters if using square splitting\n-b BOUNDARY, --boundary BOUNDARY Polygon AOI\n-s SOURCE, --source SOURCE Source data, Geojson or PG:[dbname]\n-c CUSTOM, --custom CUSTOM Custom SQL query for database\n```\n\nThis program splits a Polygon (the Area Of Interest)\nThe data source for existing data can'be either the data extract\nused by the XLSForm, or a postgresql database.\n\nExamples:\n\n```bash\narea-splitter -b AOI\narea-splitter -v -b AOI -s data.geojson\narea-splitter -v -b AOI -s PG:colorado\n\n# Where AOI is the boundary of the project as a polygon\n# And OUTFILE is a MultiPolygon output file,which defaults to fmtm.geojson\n# The task splitting defaults to squares, 50 meters across\n```\n",
"bugtrack_url": null,
"license": null,
"summary": "A utility for splitting an AOI into multiple tasks.",
"version": "3.0.0",
"project_urls": {
"documentation": "https://hotosm.github.io/fmtm-splitter",
"homepage": "https://hotosm.github.io/fmtm-splitter",
"repository": "https://github.com/hotosm/field-tm/blob/main/src/backend/packages/area-splitter"
},
"split_keywords": [
"aoi",
" field-tm",
" hot",
" postgis",
" split"
],
"urls": [
{
"comment_text": null,
"digests": {
"blake2b_256": "ed306f213934266fb70df8c3b80ba3a4e33d45d65cbbd63e44a7d62f60d53291",
"md5": "54cb1cc76daca322face7033588ffe80",
"sha256": "340e82aad404513cc0b2859c825c286f05381b58e3eaa54c30443bbb7f3ffaba"
},
"downloads": -1,
"filename": "area_splitter-3.0.0-py3-none-any.whl",
"has_sig": false,
"md5_digest": "54cb1cc76daca322face7033588ffe80",
"packagetype": "bdist_wheel",
"python_version": "py3",
"requires_python": ">=3.10",
"size": 15404,
"upload_time": "2025-09-15T10:35:22",
"upload_time_iso_8601": "2025-09-15T10:35:22.575087Z",
"url": "https://files.pythonhosted.org/packages/ed/30/6f213934266fb70df8c3b80ba3a4e33d45d65cbbd63e44a7d62f60d53291/area_splitter-3.0.0-py3-none-any.whl",
"yanked": false,
"yanked_reason": null
},
{
"comment_text": null,
"digests": {
"blake2b_256": "4173f0b653696d1aaa59738880409009b40192d6bfa16053915fc2d2449914fa",
"md5": "59225ec3852990e5a3415eb137e9460c",
"sha256": "3358f1732eef338503f4b63f4610ce69852926a5b03e5c9111c1dafc5eab1595"
},
"downloads": -1,
"filename": "area_splitter-3.0.0.tar.gz",
"has_sig": false,
"md5_digest": "59225ec3852990e5a3415eb137e9460c",
"packagetype": "sdist",
"python_version": "source",
"requires_python": ">=3.10",
"size": 140308,
"upload_time": "2025-09-15T10:35:24",
"upload_time_iso_8601": "2025-09-15T10:35:24.174245Z",
"url": "https://files.pythonhosted.org/packages/41/73/f0b653696d1aaa59738880409009b40192d6bfa16053915fc2d2449914fa/area_splitter-3.0.0.tar.gz",
"yanked": false,
"yanked_reason": null
}
],
"upload_time": "2025-09-15 10:35:24",
"github": true,
"gitlab": false,
"bitbucket": false,
"codeberg": false,
"github_user": "hotosm",
"github_project": "field-tm",
"travis_ci": false,
"coveralls": false,
"github_actions": true,
"lcname": "area-splitter"
}
