Added Send trait to vector structs

src/dataset.rs

@@ -282,6 +282,8 @@ impl<'a> Default for LayerOptions<'a> {
     }
 }
 
+unsafe impl Send for LayerOptions<'_> {}
+
 // GDAL Docs state: The returned dataset should only be accessed by one thread at a time.
 // See: https://gdal.org/api/raster_c_api.html#_CPPv48GDALOpenPKc10GDALAccess
 // Additionally, VRT Datasets are not safe before GDAL 2.3.

src/spatial_ref/srs.rs

@@ -594,6 +594,8 @@ impl SpatialRef {
     }
 }
 
+unsafe impl Send for SpatialRef {}
+
 #[derive(Debug, Clone)]
 /// Defines the bounding area of valid use for a [`SpatialRef`].
 ///
@@ -635,7 +637,7 @@ mod tests {
         #[cfg(not(major_ge_3))]
         assert_eq!(spatial_ref.to_wkt().unwrap(), "PROJCS[\"unnamed\",GEOGCS[\"GRS 1980(IUGG, 1980)\",DATUM[\"unknown\",SPHEROID[\"GRS80\",6378137,298.257222101]],PRIMEM[\"Greenwich\",0],UNIT[\"degree\",0.0174532925199433]],PROJECTION[\"Lambert_Azimuthal_Equal_Area\"],PARAMETER[\"latitude_of_center\",52],PARAMETER[\"longitude_of_center\",10],PARAMETER[\"false_easting\",4321000],PARAMETER[\"false_northing\",3210000],UNIT[\"Meter\",1]]");
         #[cfg(major_ge_3)]
-        assert_eq!(spatial_ref.to_wkt().unwrap(), "PROJCS[\"unknown\",GEOGCS[\"unknown\",DATUM[\"Unknown based on GRS80 ellipsoid\",SPHEROID[\"GRS 1980\",6378137,298.257222101,AUTHORITY[\"EPSG\",\"7019\"]]],PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],UNIT[\"degree\",0.0174532925199433,AUTHORITY[\"EPSG\",\"9122\"]]],PROJECTION[\"Lambert_Azimuthal_Equal_Area\"],PARAMETER[\"latitude_of_center\",52],PARAMETER[\"longitude_of_center\",10],PARAMETER[\"false_easting\",4321000],PARAMETER[\"false_northing\",3210000],UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],AXIS[\"Easting\",EAST],AXIS[\"Northing\",NORTH]]");
+        assert_eq!(spatial_ref.to_wkt().unwrap(), "PROJCS[\"unknown\",GEOGCS[\"unknown\",DATUM[\"Unknown based on GRS 1980 ellipsoid\",SPHEROID[\"GRS 1980\",6378137,298.257222101,AUTHORITY[\"EPSG\",\"7019\"]]],PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],UNIT[\"degree\",0.0174532925199433,AUTHORITY[\"EPSG\",\"9122\"]]],PROJECTION[\"Lambert_Azimuthal_Equal_Area\"],PARAMETER[\"latitude_of_center\",52],PARAMETER[\"longitude_of_center\",10],PARAMETER[\"false_easting\",4321000],PARAMETER[\"false_northing\",3210000],UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],AXIS[\"Easting\",EAST],AXIS[\"Northing\",NORTH]]");
     }
 
     #[test]

src/vector/defn.rs

@@ -61,6 +61,8 @@ impl Defn {
     }
 }
 
+unsafe impl Send for Defn {}
+
 pub struct FieldIterator<'a> {
     defn: &'a Defn,
     c_feature_defn: OGRFeatureDefnH,

src/vector/feature.rs

@@ -668,6 +668,8 @@ impl<'a> Feature<'a> {
     }
 }
 
+unsafe impl Send for Feature<'_> {}
+
 pub struct FieldValueIterator<'a> {
     feature: &'a Feature<'a>,
     idx: i32,

src/vector/geometry.rs

@@ -381,6 +381,8 @@ impl Debug for GeometryRef<'_> {
     }
 }
 
+unsafe impl Send for GeometryRef<'_> {}
+
 #[cfg(test)]
 mod tests {
     use super::*;

src/vector/layer.rs

@@ -137,6 +137,8 @@ impl<'a> Layer<'a> {
     }
 }
 
+unsafe impl Send for Layer<'_> {}
+
 /// Layer in a vector dataset
 ///
 /// ```

src/vector/ops/transformations.rs

@@ -255,7 +255,7 @@ mod tests {
         let triangles = Geometry::from_wkt(
             "POLYGON ((20 35,10 10,30 5,45 20,20 35),(30 20,20 15,20 25,30 20))",
         )?;
-        assert_eq!(donut.simplify_preserve_topology(100.0)?, triangles);
+        assert_eq!(donut.simplify_preserve_topology(20.0)?, triangles);
         Ok(())
     }