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Improve bbox formatting (#1001)

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Formats bbox using the most appropriate precision for that zoom level
This commit is contained in:
Yuri Astrakhan 2023-11-13 03:53:15 -05:00 committed by GitHub
parent 021cddcccd
commit b0e19d3787
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 134 additions and 96 deletions
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17
docs/src/51-mbtiles-meta.md
View File

@ -9,15 +9,16 @@ Schema: flat
File size: 48.00KiB
Page size: 4.00KiB
Page count: 12
| Zoom | Count |Smallest | Largest | Average | BBox |
| 0| 1| 1.08KiB| 1.08KiB| 1.08KiB|-179.99999997494382,-85.05112877764508,180.00000015460688,85.05112879314403|
| 1| 4| 160B| 650B| 366B|-179.99999997494382,-85.05112877764508,180.00000015460688,85.05112879314403|
| 2| 7| 137B| 495B| 239B|-179.99999997494382,-66.51326042021836,180.00000015460688,66.51326049182072|
| 3| 17| 67B| 246B| 134B|-134.99999995874995,-40.9798980140281,180.00000015460688,66.51326049182072|
| 4| 38| 64B| 175B| 86B|-134.99999995874995,-40.9798980140281,180.00000015460688,66.51326049182072|
| 5| 57| 64B| 107B| 72B|-123.74999995470151,-40.9798980140281,180.00000015460688,61.60639642757953|
| 6| 72| 64B| 97B| 68B|-123.74999995470151,-40.9798980140281,180.00000015460688,61.60639642757953|
| all| 196| 64B| 1.0KiB| 96B|
| 0| 1| 1.08KiB| 1.08KiB| 1.08KiB| -180,-85,180,85 |
| 1| 4| 160B| 650B| 366B| -180,-85,180,85 |
| 2| 7| 137B| 495B| 239B| -180,-67,180,67 |
| 3| 17| 67B| 246B| 134B| -135,-41,180,67 |
| 4| 38| 64B| 175B| 86B| -135,-41,180,67 |
| 5| 57| 64B| 107B| 72B| -124,-41,180,62 |
| 6| 72| 64B| 97B| 68B| -124,-41,180,62 |
| all| 196| 64B| 1.0KiB| 96B| -180,-85,180,85 |
```
## meta-all

184
mbtiles/src/mbtiles.rs
View File

@ -43,10 +43,10 @@ pub struct Metadata {
#[derive(Clone, Debug, PartialEq, Serialize)]
pub struct ZoomInfo {
pub zoom: u8,
pub count: u64,
pub smallest: u64,
pub largest: u64,
pub average: f64,
pub tile_count: u64,
pub min_tile_size: u64,
pub max_tile_size: u64,
pub avg_tile_size: f64,
pub bbox: Bounds,
}
@ -57,11 +57,14 @@ pub struct Summary {
pub mbt_type: MbtType,
pub page_size: u64,
pub page_count: u64,
pub tile_count: u64,
pub min_tile_size: Option<u64>,
pub max_tile_size: Option<u64>,
pub avg_tile_size: f64,
pub bbox: Option<Bounds>,
pub min_zoom: Option<u8>,
pub max_zoom: Option<u8>,
pub zoom_info: Vec<ZoomInfo>,
pub count: u64,
pub smallest: Option<u64>,
pub largest: Option<u64>,
pub average: f64,
}
impl Display for Summary {
@ -78,44 +81,54 @@ impl Display for Summary {
let page_size = SizeFormatterBinary::new(self.page_size);
writeln!(f, "Page size: {page_size:.2}B")?;
writeln!(f, "Page count: {:.2}", self.page_count)?;
writeln!(f)?;
writeln!(
f,
"|{:^9}|{:^9}|{:^9}|{:^9}|{:^9}|{:^9}|",
"|{:^9}|{:^9}|{:^9}|{:^9}|{:^9}| {:^20} |",
"Zoom", "Count", "Smallest", "Largest", "Average", "BBox"
)?;
for l in &self.zoom_info {
let smallest = SizeFormatterBinary::new(l.smallest);
let largest = SizeFormatterBinary::new(l.largest);
let average = SizeFormatterBinary::new(l.average as u64);
let min = SizeFormatterBinary::new(l.min_tile_size);
let max = SizeFormatterBinary::new(l.max_tile_size);
let avg = SizeFormatterBinary::new(l.avg_tile_size as u64);
let prec = get_zoom_precision(l.zoom);
writeln!(
f,
"|{:>9}|{:>9}|{:>9}|{:>9}|{:>9}|{:>9}|",
"|{:>9}|{:>9}|{:>9}|{:>9}|{:>9}| {:<20} |",
l.zoom,
l.count,
format!("{smallest:.2}B"),
format!("{largest:.2}B"),
format!("{average:.2}B"),
l.bbox
l.tile_count,
format!("{min:.2}B"),
format!("{max:.2}B"),
format!("{avg:.2}B"),
format!("{:.prec$}", l.bbox),
)?;
}
if let (Some(smallest), Some(largest)) = (self.smallest, self.largest) {
let smallest = SizeFormatterBinary::new(smallest);
let largest = SizeFormatterBinary::new(largest);
let average = SizeFormatterBinary::new(self.average as u64);
if self.zoom_info.len() > 1 {
if let (Some(min), Some(max), Some(bbox), Some(max_zoom)) = (
self.min_tile_size,
self.max_tile_size,
self.bbox,
self.max_zoom,
) {
let min = SizeFormatterBinary::new(min);
let max = SizeFormatterBinary::new(max);
let avg = SizeFormatterBinary::new(self.avg_tile_size as u64);
let prec = get_zoom_precision(max_zoom);
writeln!(
f,
"|{:>9}|{:>9}|{:>9}|{:>9}|{:>9}|",
"|{:>9}|{:>9}|{:>9}|{:>9}|{:>9}| {:<20} |",
"all",
self.count,
format!("{smallest}B"),
format!("{largest}B"),
format!("{average}B")
self.tile_count,
format!("{min}B"),
format!("{max}B"),
format!("{avg}B"),
format!("{:.prec$}", bbox),
)?;
}
}
Ok(())
}
@ -131,6 +144,16 @@ fn serialize_ti<S: Serializer>(ti: &TileInfo, serializer: S) -> Result<S::Ok, S:
s.end()
}
fn get_zoom_precision(zoom: u8) -> usize {
let lng_delta = webmercator_to_wgs84(40075016.7 / (2_u32.pow(zoom as u32)) as f64, 0f64).0;
let log = lng_delta.log10() - 0.5;
if log > 0_f64 {
0
} else {
-log.ceil() as usize
}
}
/// Metadata key for the aggregate tiles hash value
pub const AGG_TILES_HASH: &str = "agg_tiles_hash";
@ -339,10 +362,10 @@ impl Mbtiles {
let zoom = u8::try_from(r.zoom.unwrap()).expect("zoom_level is not a u8");
ZoomInfo {
zoom,
count: r.count as u64,
smallest: r.smallest.unwrap_or(0) as u64,
largest: r.largest.unwrap_or(0) as u64,
average: r.average.unwrap_or(0.0),
tile_count: r.count as u64,
min_tile_size: r.smallest.unwrap_or(0) as u64,
max_tile_size: r.largest.unwrap_or(0) as u64,
avg_tile_size: r.average.unwrap_or(0.0),
bbox: Self::xyz_to_bbox(
zoom,
r.min_tile_x.unwrap(),
@ -354,10 +377,10 @@ impl Mbtiles {
})
.collect();
let count = zoom_info.iter().map(|l| l.count).sum();
let tile_count = zoom_info.iter().map(|l| l.tile_count).sum();
let avg_sum = zoom_info
.iter()
.map(|l| l.average * l.count as f64)
.map(|l| l.avg_tile_size * l.tile_count as f64)
.sum::<f64>();
Ok(Summary {
@ -366,10 +389,13 @@ impl Mbtiles {
mbt_type,
page_size,
page_count,
count,
smallest: zoom_info.iter().map(|l| l.smallest).reduce(u64::min),
largest: zoom_info.iter().map(|l| l.largest).reduce(u64::max),
average: avg_sum / count as f64,
tile_count,
min_tile_size: zoom_info.iter().map(|l| l.min_tile_size).reduce(u64::min),
max_tile_size: zoom_info.iter().map(|l| l.max_tile_size).reduce(u64::max),
avg_tile_size: avg_sum / tile_count as f64,
bbox: zoom_info.iter().map(|l| l.bbox).reduce(|a, b| a + b),
min_zoom: zoom_info.iter().map(|l| l.zoom).reduce(u8::min),
max_zoom: zoom_info.iter().map(|l| l.zoom).reduce(u8::max),
zoom_info,
})
}
@ -1036,11 +1062,14 @@ mod tests {
mbt_type: Flat
page_size: 4096
page_count: 5
tile_count: 0
min_tile_size: ~
max_tile_size: ~
avg_tile_size: NaN
bbox: ~
min_zoom: ~
max_zoom: ~
zoom_info: []
count: 0
smallest: ~
largest: ~
average: NaN
"###);
Ok(())
@ -1076,81 +1105,88 @@ mod tests {
mbt_type: Flat
page_size: 4096
page_count: 12
tile_count: 196
min_tile_size: 64
max_tile_size: 1107
avg_tile_size: 96.2295918367347
bbox:
- -179.99999997494382
- -85.05112877764508
- 180.00000015460688
- 85.05112879314403
min_zoom: 0
max_zoom: 6
zoom_info:
- zoom: 0
count: 1
smallest: 1107
largest: 1107
average: 1107
tile_count: 1
min_tile_size: 1107
max_tile_size: 1107
avg_tile_size: 1107
bbox:
- -179.99999997494382
- -85.05112877764508
- 180.00000015460688
- 85.05112879314403
- zoom: 1
count: 4
smallest: 160
largest: 650
average: 366.5
tile_count: 4
min_tile_size: 160
max_tile_size: 650
avg_tile_size: 366.5
bbox:
- -179.99999997494382
- -85.05112877764508
- 180.00000015460688
- 85.05112879314403
- zoom: 2
count: 7
smallest: 137
largest: 495
average: 239.57142857142858
tile_count: 7
min_tile_size: 137
max_tile_size: 495
avg_tile_size: 239.57142857142858
bbox:
- -179.99999997494382
- -66.51326042021836
- 180.00000015460688
- 66.51326049182072
- zoom: 3
count: 17
smallest: 67
largest: 246
average: 134
tile_count: 17
min_tile_size: 67
max_tile_size: 246
avg_tile_size: 134
bbox:
- -134.99999995874995
- -40.9798980140281
- 180.00000015460688
- 66.51326049182072
- zoom: 4
count: 38
smallest: 64
largest: 175
average: 86
tile_count: 38
min_tile_size: 64
max_tile_size: 175
avg_tile_size: 86
bbox:
- -134.99999995874995
- -40.9798980140281
- 180.00000015460688
- 66.51326049182072
- zoom: 5
count: 57
smallest: 64
largest: 107
average: 72.7719298245614
tile_count: 57
min_tile_size: 64
max_tile_size: 107
avg_tile_size: 72.7719298245614
bbox:
- -123.74999995470151
- -40.9798980140281
- 180.00000015460688
- 61.60639642757953
- zoom: 6
count: 72
smallest: 64
largest: 97
average: 68.29166666666667
tile_count: 72
min_tile_size: 64
max_tile_size: 97
avg_tile_size: 68.29166666666667
bbox:
- -123.74999995470151
- -40.9798980140281
- 180.00000015460688
- 61.60639642757953
count: 196
smallest: 64
largest: 1107
average: 96.2295918367347
"###);
Ok(())

19
tests/expected/mbtiles/summary.txt
View File

@ -3,13 +3,14 @@ Schema: flat
File size: 48.00KiB
Page size: 4.00KiB
Page count: 12
| Zoom | Count |Smallest | Largest | Average | BBox |
| 0| 1| 1.08KiB| 1.08KiB| 1.08KiB|-179.99999997494382,-85.05112877764508,180.00000015460688,85.05112879314403|
| 1| 4| 160B| 650B| 366B|-179.99999997494382,-85.05112877764508,180.00000015460688,85.05112879314403|
| 2| 7| 137B| 495B| 239B|-179.99999997494382,-66.51326042021836,180.00000015460688,66.51326049182072|
| 3| 17| 67B| 246B| 134B|-134.99999995874995,-40.9798980140281,180.00000015460688,66.51326049182072|
| 4| 38| 64B| 175B| 86B|-134.99999995874995,-40.9798980140281,180.00000015460688,66.51326049182072|
| 5| 57| 64B| 107B| 72B|-123.74999995470151,-40.9798980140281,180.00000015460688,61.60639642757953|
| 6| 72| 64B| 97B| 68B|-123.74999995470151,-40.9798980140281,180.00000015460688,61.60639642757953|
| all| 196| 64B| 1.0KiB| 96B|
| Zoom | Count |Smallest | Largest | Average | BBox |
| 0| 1| 1.08KiB| 1.08KiB| 1.08KiB| -180,-85,180,85 |
| 1| 4| 160B| 650B| 366B| -180,-85,180,85 |
| 2| 7| 137B| 495B| 239B| -180,-67,180,67 |
| 3| 17| 67B| 246B| 134B| -135,-41,180,67 |
| 4| 38| 64B| 175B| 86B| -135,-41,180,67 |
| 5| 57| 64B| 107B| 72B| -124,-41,180,62 |
| 6| 72| 64B| 97B| 68B| -124,-41,180,62 |
| all| 196| 64B| 1.0KiB| 96B| -180,-85,180,85 |