I've added flatgeobuf to my project, and iterating over features and reading geometries worked fine. But now I try to read a field, called "x" (it's the X coordinate of the tile the object is in), and it's giving me an error.
// [dependencies]
// geozero = "0.9"
// flatgeobuf = "3.24.0"
// #2 and #3 are traits that are required to be in scope
use flatgeobuf::{FgbReader, FallibleStreamingIterator, FeatureProperties};
use std::{
error::Error,
fs::File,
io::BufReader,
};
fn read_sources() -> Result<(), Box<dyn Error>> {
let sources_path = "sources.fgb";
let mut file = BufReader::new(File::open(sources_path)?);
let mut sources = FgbReader::open(&mut file)?.select_all()?;
while let Some(item) = sources.next()? {
let g = item.geometry().unwrap().xy().unwrap();
let x = item.property("x")?;
let y = item.property("y")?;
//println!("{} {} {:?}", x, y, g); // won't work anyway
break;
}
Ok(())
}
This fails to compile at item.property(...):
error[E0277]: the trait bound `(): geozero::property_processor::PropertyReadType` is not satisfied
--> src/main.rs:127:16
|
127 | let x = item.property("x")?;
| ^^^^^^^^ the trait `geozero::property_processor::PropertyReadType` is not implemented for `()`
|
note: required by a bound in `property`
--> /home/culebron/.cargo/registry/src/github.com-1ecc6299db9ec823/geozero-0.9.5/src/api.rs:67:20
|
67 | fn property<T: PropertyReadType>(&self, name: &str) -> Result<T> {
| ^^^^^^^^^^^^^^^^ required by this bound in `property`
I tried importing these traits, but it made no difference.
Is this fatal? (like I can't use the crate because it won't compile anyway?)
P.S.: I saw that versions in flatgeobuf are weird: 0.7, 0.8, then immediately 3.24.0. So I switched version to 0.8.0, but the error was exactly the same.
