Struct gdal::vector::Layer

pub struct Layer<'a> { /* private fields */ }

Layer in a vector dataset

use std::path::Path;
use gdal::Dataset;
use gdal::vector::LayerAccess;

let dataset = Dataset::open(Path::new("fixtures/roads.geojson")).unwrap();
let mut layer = dataset.layer(0).unwrap();
for feature in layer.features() {
    // do something with each feature
}

Trait Implementations

impl<'a> Debug for Layer<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> LayerAccess for Layer<'a>

unsafe fn c_layer(&self) -> OGRLayerH

Returns the C wrapped pointer

fn defn(&self) -> &Defn

fn feature(&self, fid: u64) -> Option<Feature<'_>>

Returns the feature with the given feature id fid, or None if not found.

fn features(&mut self) -> FeatureIterator<'_>

Returns iterator over the features in this layer.

fn set_feature(&self, feature: Feature<'_>) -> Result<()>

Set a feature on this layer layer.

fn set_spatial_filter(&mut self, geometry: &Geometry)

Set a spatial filter on this layer.

fn set_spatial_filter_rect( &mut self, min_x: f64, min_y: f64, max_x: f64, max_y: f64 )

Set a spatial rectangle filter on this layer by specifying the bounds of a rectangle.

fn clear_spatial_filter(&mut self)

Clear spatial filters set on this layer.

fn name(&self) -> String

Get the name of this layer.

fn has_capability(&self, capability: LayerCaps) -> bool

fn create_defn_fields(&self, fields_def: &[(&str, Type)]) -> Result<()>

fn create_feature(&mut self, geometry: Geometry) -> Result<()>

fn create_feature_fields( &mut self, geometry: Geometry, field_names: &[&str], values: &[FieldValue] ) -> Result<()>

fn feature_count(&self) -> u64

Returns the number of features in this layer, even if it requires expensive calculation.

fn try_feature_count(&self) -> Option<u64>

Returns the number of features in this layer, if it is possible to compute this efficiently.

fn get_extent(&self) -> Result<Envelope>

Returns the extent of this layer as an axis-aligned bounding box, even if it requires expensive calculation.

fn try_get_extent(&self) -> Result<Option<Envelope>>

Returns the extent of this layer as an axis-aligned bounding box, if it is possible to compute this efficiently.

fn spatial_ref(&self) -> Option<SpatialRef>

Get the spatial reference system for this layer.

fn reset_feature_reading(&mut self)

fn set_attribute_filter(&mut self, query: &str) -> Result<()>

Set a new attribute query that restricts features when using the feature iterator.

fn clear_attribute_filter(&mut self)

Clear the attribute filter set on this layer

unsafe fn read_arrow_stream( &mut self, out_stream: *mut ArrowArrayStream, options: &CslStringList ) -> Result<()>

Read batches of columnar Arrow data from OGR.

impl<'a> Metadata for Layer<'a>

fn description(&self) -> Result<String>

For most crate::Datasets, method returns this is the originating filename. For crate::raster::RasterBands it is a description (if supported) or "".

fn metadata_domains(&self) -> Vec<String>

Metadata in GDAL is partitioned into namespaces, knows as “domains” in the GDAL Data Model. GDAL types with metadata (a.k.a. “Major Objects”) have a default or “root” domain identified by the empty string (""). Specific “Major Object” types may have other conventionally recognized domains. For example, in raster Datasets you may come across the domains SUBDATASETS, IMAGE_STRUCTURE, RPC, IMAGERY, xml:, etc.

fn metadata_domain(&self, domain: &str) -> Option<Vec<String>>

Get all the metadata values within the given domain. Returns None if domain is not defined. Entries in the returned Vec<String> are formatted as “Name=value” pairs

fn metadata_item(&self, key: &str, domain: &str) -> Option<String>

Get a single metadata entry, as indicated by key and domain.

fn set_metadata_item( &mut self, key: &str, value: &str, domain: &str ) -> Result<()>

Set a metadata item in given domain at given key.

fn set_description(&mut self, description: &str) -> Result<()>

For Datasets this sets the dataset name; normally application code should not set the “description” for GDALDatasets. For RasterBands it is actually a description (if supported) or "".

fn metadata(&self) -> MetadataIter<'_>where Self: Sized,

Get an iterator over metadata entries, across all domains.