From cd5b4f99c115a5da0273f92a95d2f25c3680c835 Mon Sep 17 00:00:00 2001
From: alainlhostis <77492321+alainlhostis@users.noreply.github.com>
Date: Wed, 15 Jan 2025 15:41:16 +0100
Subject: [PATCH] Update create_dataset.md

The transport modes file **must contain at least two modes, including a mode named 'Road'** that will be considered for the basic geographical time-space surface, id est the cones.
---
 markdown/usrdoc/create_dataset.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/markdown/usrdoc/create_dataset.md b/markdown/usrdoc/create_dataset.md
index 4cac2c95..02536106 100644
--- a/markdown/usrdoc/create_dataset.md
+++ b/markdown/usrdoc/create_dataset.md
@@ -178,6 +178,8 @@ For the sake of readability this file usually contains two optional columns of _
 | _name_      | string | __yes__       | mode name                       |
 | _code_      | number | __yes__       | unique id of the transport mode |
 
+The transport modes file **must contain at least two modes, including a mode named 'Road'** that will be considered for the basic geographical time-space surface, id est the cones.
+
 ### Transport mode speeds file
 
 A given transport mode may experience an increase of speed over time, e.g. the five acceleration phases of China classical railways (non High Speed Rail) between 1997 and 2004