Map view layer: Avalanche observations

REQUIREMENTS
Permission	All users
Connectivity	Online only

This document describes the functionality of the Avalanche Layers layer of the Map view of the InfoEx report.

The goal of the Avalanche Layers map layer is to provide user with spatial overview of all the avalanche observations submitted to the InfoEx in the time period of the current report and give quick access to the individual avalanche records.

ISSUE

Avalanche observation that are associated with multiple locations are currently not displayed in the avalanche layers JIRA: -1236 (Dec.20,2013)

Layout

Fig. 1: Avalanche layers of map view of InfoEx report.

Fig. 2: Avalanche observation pop-up balloon.

The avalanche layers map layer shows the point locations of all of the avalanche observation included in the current report (Fig. 1).

Avalanches are shown at the following locations:

• Avalanche observation that have been given a precise map location (click here for more information on how to 'drop a pin' for an avalanche observation) are shown exactly at this location.
• Avalanche observations that were only associate with a preexisting location from the location catalog are shown at the centre point of this location.

The color and size of the avalanche icons represent typical avalanche size:

• Yellow: Size 1.0 and 1.5
• Orange: Size 2.0 and 2.5
• Red: Size 3.0 and larger

The main trigger types are listed under the Avalanche Layers label in the layer hierarchy panel left of the map (Fig. 1):

• Natural
• Skier
• Snowmobile
• Over-snow vehicle
• Helicopter
• Explosives

Functionality

• Click on the operation name in the layer hierarchy panel to directly zoom the map to its operation area and open the observation overview pop-up balloon (see below for more details).
• Click on the check box next to the operation name in the layer hierarchy panel to show/hide the outline of its operation area on the map.
• Click on the operation area of an operation on the map to view the observation overview pop-up balloon (Fig. 2). The pop-up balloon currently offers the following information:

Weather	Tmin	Lowest minimum temperature recorded at weather sites by this operation during the time period of report.
	Tmax	Highest maximum temperature recorded at weather sites by this operation during the time period of report.
	Tpres	Latest present temperature recorded at weather sites by this operation during the time period of report.
	Wind	Latest wind observations recorded at weather sites by this operation during the time period of report.
	HN24	Total sum of HN24 observations recorded at weather sites by this operation during the time period of report.
	HS	Latest HS observations recorded at weather sites by this operation during the time period of report.
Avalanches	Num	Total number of avalanches observed by this operation during the time period of report. This is different from the total number of avalanche observations. The following conversions have been used to convert categorical to numerical values: Isolated (2), Several (7), Numerous (12).
	Max Size	Absolute highest avalanche size (size typ or size max) reported by this operation during the time period of report.
	Trig	List of avalanche triggers reported by this operation during the time period of report.

Related documents

• Operation overview
• Avalanche observations
• Avalanche hazard
• Snow Profiles
• Field summary
• Weather observations
• Time slider (used for all map layers)
• Additional external information sources

Functionality tested by

• Jan. 2, 2014: Pascal Haegeli