contour-mask.mml

# -*- yaml -*-
name: TopOSM Contour Mask
description: Contour mask layer for TopOSM.
scale: 1
metatile: 2
bounds:
  -  -180
  - -85.05112877980659
  - 180
  - 85.05112877980659
center:
  - 0
  - 0
  - 4
format: png
interactivity: false
minzoom: 0
maxzoom: 22
srs: &srs +proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs +type=crs
  
Stylesheet:
  - halo-colors.mss
  - fonts.mss
  - contour-labels.mss

_parts:
  ned: &ned
    type: postgis
    dbname: ned
    port: 5433
    extent: -20037508,-19929239,20037508,19929239

Layer:
  - id: contours-medium
    name: contours-medium
    srs: *srs
    Datasource:
      <<: *ned
      table: (SELECT ele_ft, wkb_geometry FROM contours WHERE ele_ft % 200 = 0) AS contours
  - id: contours-high
    name: contours-high
    srs: *srs
    Datasource:
      <<: *ned
      table: (SELECT ele_ft, wkb_geometry FROM contours WHERE ele_ft % 100 = 0) AS contours