From 2f2addb8a1016aa2951983deb5ec4cb215e9ae3b Mon Sep 17 00:00:00 2001
From: Hidde Wieringa <hidde@hiddewieringa.nl>
Date: Sat, 2 Nov 2024 22:11:29 +0100
Subject: [PATCH] Render railway positions for low zooms without decimal

This solves some of the clutter on the map, now that railway positions are shown in every layer.
---
 import/sql/tile_views.sql | 3 ++-
 martin/configuration.yml  | 1 +
 proxy/js/styles.mjs       | 6 +++++-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/import/sql/tile_views.sql b/import/sql/tile_views.sql
index 08c16494..c7c6a7ed 100644
--- a/import/sql/tile_views.sql
+++ b/import/sql/tile_views.sql
@@ -247,7 +247,8 @@ CREATE OR REPLACE VIEW railway_text_km AS
     way,
     railway,
     pos,
-    (railway_pos_decimal(pos) = '0') as zero
+    (railway_pos_decimal(pos) = '0') as zero,
+    left(pos, -2) as pos_int
   FROM
     (SELECT
        id,
diff --git a/martin/configuration.yml b/martin/configuration.yml
index ad6ba899..49ab6682 100644
--- a/martin/configuration.yml
+++ b/martin/configuration.yml
@@ -212,6 +212,7 @@ postgres:
         id: integer
         railway: string
         pos: string
+        pos_int: string
         zero: boolean
 
     standard_railway_switch_ref:
diff --git a/proxy/js/styles.mjs b/proxy/js/styles.mjs
index 4e732f7c..d8d155e3 100644
--- a/proxy/js/styles.mjs
+++ b/proxy/js/styles.mjs
@@ -1087,7 +1087,11 @@ const railwayKmText = {
   },
   layout: {
     'symbol-z-order': 'source',
-    'text-field': '{pos}',
+    'text-field': ['step', ['zoom'],
+      ['get', 'pos_int'],
+      13,
+      ['get', 'pos'],
+    ],
     'text-font': ['Noto Sans Bold'],
     'text-size': 11,
   },