Crate geozero

Zero-Copy reading and writing of geospatial data.

GeoZero defines an API for reading geospatial data formats without an intermediate representation. It defines traits which can be implemented to read and convert to an arbitrary format or render geometries directly.

Supported geometry types:

• OGC Simple Features
• Circular arcs as defined by SQL-MM Part 3
• TIN

Supported dimensions: X, Y, Z, M, T

Installation

[dependencies]
geozero = "0.2"

Zero-copy geometry reader

Geometries can be accessed by implementing the GeomProcessor trait.

use geozero::{GeomProcessor, error::Result};

struct CoordPrinter;

impl GeomProcessor for CoordPrinter {
    fn xy(&mut self, x: f64, y: f64, _idx: usize) -> Result<()> {
        Ok(println!("({} {})", x, y))
    }
}

Zero-copy feature access

Properties can be accessed by implementing the PropertyProcessor trait.

use geozero::{PropertyProcessor, ColumnValue, error::Result};

struct PropertyPrinter;

impl PropertyProcessor for PropertyPrinter {
    fn property(&mut self, i: usize, n: &str, v: &ColumnValue) -> Result<bool> {
        println!("columnidx: {} name: {} value: {:?}", i, n, v);
        Ok(false) // don't abort
    }
}

Modules

error

Structs

CoordDimensions	Dimensions requested for processing
CreateOpts
Extent
Multiplexer
OpenOpts
ProcessorSink	Empty processor implementation
SelectOpts

Enums

ColumnValue

Traits

FeatureAccess	Feature processing API
FeatureGeometry	Feature properties processing API
FeatureProcessor	Feature processing trait
FeatureProperties	Feature properties processing API
GeomProcessor	Geometry processing trait
HttpReader	Async datasource HTTP reader API (Experimental)
PropertyProcessor	Feature property processing trait
PropertyReadType
ReadSeek
Reader	Datasource reader API (Experimental)
Writer	Datasource writer API (Experimental)