geofast 0.5.2

High-performance geospatial processing with GPU acceleration, Numba JIT, and format conversion

GeoFast

High-performance geospatial processing framework: an aerial-spray line-generation engine (compiled Rust), GPU acceleration, Numba JIT compilation, file format conversion, and intelligent caching.

Features

• Aerial spray line generation: compiled Rust engine (ellipsoidal projection, sweep-angle search, per-gap fly-through-vs-turn, boustrophedon cell decomposition) producing crop-spraying coverage paths
• Multi-backend execution: CPU, CPU Parallel, GPU (CUDA), Numba JIT, Hybrid
• Automatic backend selection: Based on data size and available hardware
• File format conversion: GeoJSON, KML, GPX, CSV, MPZ/MapPlus
• Numba JIT primitives: Point-in-polygon, haversine, Douglas-Peucker, hex grids
• Spatial indexing: R-tree, hex grid index, point index
• GPU kernels: CUDA acceleration via Numba CUDA and CuPy
• Intelligent caching: Memory and disk caching for expensive computations
• Command-line interface: Convert files, view system info, manage cache

Installation

# Basic installation (CPU only)
pip install geofast

# With Numba JIT support (recommended)
pip install geofast[full]

# With GPU support (requires NVIDIA GPU + CUDA)
pip install geofast[gpu]

# Everything
pip install geofast[all]

Prebuilt wheels bundle the compiled spray engine, so pip install geofast needs no Rust toolchain. numpy and shapely are installed by default. A Rust toolchain is only required when building from source (an sdist or a git checkout), which is handled automatically by maturin.

Quick Start

Spray Pattern Generation

from geofast import generate_spray_patterns

# Read a field boundary (GeoJSON/KML/...), generate spray lines, write the result.
# The Rust engine selects the spray angle and decomposes the field itself.
generate_spray_patterns(
    "field.geojson", "spray.geojson",
    config={"swath_width_ft": 50.0},
)

For finer control, the generator and optimizer are available directly:

from geofast.spray_line_generator import SprayLineGenerator, SprayConfig

gen = SprayLineGenerator(SprayConfig(swath_width_ft=50.0))
result = gen.generate(field_coords)  # field_coords: GeoJSON polygon rings, lon/lat degrees
print(result.num_lines, result.total_spray_distance_miles, result.field_area_acres)

File Format Conversion

from geofast import convert, read_kml, MPZReader

# Convert between formats (auto-detects from extension)
convert('tracks.kml', 'tracks.geojson')
convert('field.geojson', 'field.kml')
convert('points.csv', 'points.gpx')

# Read KML directly
data = read_kml('file.kml')  # Returns GeoJSON-like dict

# Read MapPlus/MPZ files
with MPZReader('data.mpz') as reader:
    tracks = reader.get_tracks()
    polygons = reader.get_polygons()
    geojson = reader.to_geojson()

High-Performance Primitives

from geofast import (
    haversine_scalar, haversine_batch,
    point_in_polygon, points_in_polygon_batch,
    douglas_peucker,
    lat_lon_to_hex, polygon_to_hex_cells,
)
import numpy as np

# Fast haversine distance (Numba JIT)
dist = haversine_scalar(lat1, lon1, lat2, lon2, radius=3959)  # miles

# Batch operations (parallel)
lats1 = np.array([40.0, 41.0, 42.0])
lons1 = np.array([-74.0, -73.0, -72.0])
distances = haversine_batch(lats1, lons1, lats2, lons2)

# Point-in-polygon (Numba JIT)
poly_x = np.array([0, 1, 1, 0, 0], dtype=np.float64)
poly_y = np.array([0, 0, 1, 1, 0], dtype=np.float64)
inside = point_in_polygon(0.5, 0.5, poly_x, poly_y)  # True

# Line simplification
coords = np.array([[0, 0], [1, 0.1], [2, 0], [3, 0.1], [4, 0]])
simplified = douglas_peucker(coords, epsilon=0.2)

# Hex grid operations
q, r = lat_lon_to_hex(40.7128, -74.0060, hex_size_lat=0.001, hex_size_lon=0.001)

Spatial Indexing

from geofast import SpatialIndex, HexGridIndex

# R-tree index for fast polygon queries
index = SpatialIndex()
index.add_polygon('field1', polygon_coords)
index.add_polygon('field2', polygon_coords)
index.build()

# O(log n) point query
hits = index.query_point(lon, lat)

# Hex grid index for O(1) lookups
hex_index = HexGridIndex(hex_size_lat=0.001, hex_size_lon=0.001)
hex_index.add_polygons(polygons_dict)
hex_index.build()
field_ids = hex_index.query_point(lat, lon)

GPU Acceleration

from geofast import haversine_auto, hex_keys_auto, gpu_available

# Automatically uses GPU for large arrays, CPU for small
distances = haversine_auto(lats1, lons1, lats2, lons2)
q_arr, r_arr = hex_keys_auto(lats, lons, hex_size_lat, hex_size_lon)

# Check GPU availability
if gpu_available():
    print("GPU acceleration available!")

Caching

from geofast import (
    get_polygon_cell_cache,
    cached,
    set_cache_config,
    print_cache_stats,
)

# Enable/configure caching
set_cache_config(enabled=True, cache_dir='~/.geofast/cache')

# Cache expensive computations
cache = get_polygon_cell_cache()
cells = cache.get_or_compute(polygon, hex_lat, hex_lon, compute_func)

# Decorator for automatic caching
@cached(cache_type='disk', ttl=3600)
def expensive_computation(data):
    ...

# View cache statistics
print_cache_stats()

Decorator-based Backend Selection

from geofast import process, Backend

# Auto-select best backend based on data size
@process(backend=Backend.AUTO, item_count_arg="geometries")
def simplify_fields(geometries, tolerance=0.001):
    from shapely import simplify
    return list(simplify(geometries, tolerance))

# Force GPU with CPU fallback
@process(backend=Backend.GPU, fallback=Backend.CPU)
def compute_distances(lats1, lons1, lats2, lons2):
    ...

# Parallel file processing
@process(backend=Backend.CPU_PARALLEL, batch=True)
def convert_files(filepaths):
    ...

Command Line Interface

# Convert files
geofast convert input.kml output.geojson
geofast convert tracks.mpz tracks.geojson

# Show system info
geofast info
geofast info --cache

# Manage cache
geofast cache --stats
geofast cache --clear

# List supported formats
geofast formats

Supported File Formats

Format	Read	Write	Notes
GeoJSON	✅	✅	.geojson, .json
KML	✅	✅	.kml
GPX	✅	✅	.gpx (tracks, waypoints, routes)
CSV	✅	✅	Requires lat/lon columns
MPZ/MapPlus	✅	❌	.mpz, .sdb (SQLite-based)
Shapefile	✅	✅	Requires fiona

Backends

Backend	Best For	Requirements
CPU	Small datasets, simple operations	numpy
CPU_PARALLEL	File I/O, embarrassingly parallel tasks	numpy
GPU	Large arrays (10k+), matrix operations	cupy
NUMBA	Tight loops, custom algorithms	numba
NUMBA_CUDA	Custom GPU kernels	numba + CUDA
HYBRID	Very large datasets, max throughput	all
AUTO	Let GeoFast decide	any

Configuration

from geofast import set_config

set_config(
    max_workers=8,           # CPU cores to use
    chunk_size=1000,         # Items per parallel chunk
    gpu_batch_size=10000,    # Items per GPU batch
    auto_gpu_min_items=1000, # Threshold for AUTO->GPU
    verbose=True             # Log backend selection
)

Performance

Benchmarks on a system with 16 CPU cores and NVIDIA RTX 4050:

Operation	Original	With GeoFast	Speedup
Polygon cell computation (7352 polygons)	~20s	1.3s (cached)	15x
Track processing (262 tracks)	~60s	10.7s	5.6x
Point-in-polygon (batch)	~30s	4.7s	6.4x
Full analysis pipeline	~300s	41s	7.3x

Spray Pattern Generation

Generate optimal spray lines for agricultural fields:

from geofast import generate_spray_patterns

# Generate spray lines from field boundaries
generate_spray_patterns(
    'fields.kml',           # Input: field polygons
    'spray_lines.geojson',  # Output: spray lines + boundaries
    config={
        'swath_width_ft': 50,    # Spray width per pass
        'hop_distance_ft': 1300  # Max gap for pilot hopping
    }
)

Features

• Optimal direction selection: Automatically chooses N-S or E-W based on field shape
• Multi-field optimization: Groups nearby fields for consistent spray direction
• Powerline detection: Flags fields with hasPowerlines: true when transmission lines intersect
• Efficiency metrics: Calculates acres/hour, total time, line counts

Command Line

# Basic usage
geofast spray field.kml lines.geojson

# With options
geofast spray field.kml lines.geojson --swath 60 --metadata

# Ground operations (no hopping)
geofast spray field.kml lines.geojson --no-hop

Output Properties

Each field boundary in the output includes:

• hasPowerlines: Boolean indicating if powerlines cross the field
• angle: Optimal spray direction (0=N-S, 90=E-W)
• acres: Field area
• num_tracks: Number of spray passes

Project Structure

geofast/
├── __init__.py      # Package exports
├── core.py          # Backend enum, @process decorator
├── executor.py      # Backend dispatch logic
├── primitives.py    # Numba JIT functions
├── spatial_index.py # R-tree, hex grid indexing
├── cuda_kernels.py  # GPU kernels (CUDA/CuPy)
├── parallel.py      # Shared memory, parallel utilities
├── geo_ops.py       # High-level geo operations
├── formats.py       # File format converters
├── cache.py         # Caching layer
├── cli.py           # Command-line interface
└── utils.py         # Detection, helpers

Requirements

• Python 3.9+
• numpy

Optional

• numba (for JIT compilation)
• shapely 2.0+ (for spatial operations)
• cupy (for GPU acceleration)
• geopandas, fiona (for shapefile support)

License

MIT License - see LICENSE file for details.