Lab 3: Planning for a Tsunami Spatial Analysis, Tables, Editing

What percentage of Vancouver is in a tsunami danger zone?

To calculate what percentage of Vancouver is in danger, I firstly opened my attributes table for the layer Affected_Landuse (Figure 1).  I then added up all of the total areas in meters for each of the categories, which gave the value 14862774.11 meters. I then found the total area of Vancouver in meters by looking at the attribute table of the Vancouvermask layer, which gave the result 131033339.95 meters.  I therefore found the percentage of Vancouver that’s in danger by:

Total area in danger = 14862774.11/131033339.95 * 100 = 11.34% of Vancouver is in a tsunami danger zone.

Figure 1:

What educational and healthcare facilities are within the tsunami danger zone?

In order to find the educational facilities which are in a tsunami danger zone, I used the ArcToolbox ‘intersect’ feature.  I intersected the layers Danger_Tsumani_Landuse and Vancouver_Education, and in order to do this I inserted these layers to the input box.  I named the output feature ‘Education_within_dangerzone,’ which therefore gave me the educational facilities within the tsunami danger zone.

I repeated this process to find the healthcare facilities within the tsunami danger zone, so again I intersected the Danger_Tsunami_Landuse layer but this time I used the Vancouver_Healthcare layer, and named the output feature ‘Healthcare_within_dangerzone.’

Healthcare facilities within danger zone is seen by viewing the attribute table of the layer Healthcare_within_dangerzone, and Education facilities within danger zone is seen by viewing the attribute table of the layer Education_within_danger.  The results are seen in the table below: