# Weekly Challenge

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## Challenge #84: Map Hurricane Harvey's Storm Evolution

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Alteryx Certified Partner

Solution attached. Took a while to get it perfect.

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Seemed counter-intuitive to duplicate the rows where the segment changes but that way it allows you to have start and end points at the same location.

Thanks!

Luke - Keyrus UK

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14 - Magnetar

My stab at this.

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To "connect the lines" and ensure that the average intensity is calculated for each segment including the end points that connect, I decided to generate a new row for each individual segment. It would take on one higher sequence number than the original highest sequence number per segment, and then copy in the first intensity and spatial object from the first sequence of the next segment.

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14 - Magnetar

My solution for Harvey.

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Thought I had it done in simple 3-4 tool workflow until I realized there were gaps between the segments... so I created new points for each segment that corresponded to the start point of the next segment.

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7 - Meteor

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16 - Nebula
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Most of the tools are there to get the line segments fixed to match the solution which corrects for gaps.
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Alteryx Certified Partner

This was an interesting challenge, had to iterate on this one.

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At first, it looked straightforward to me, but my lines had gaps between them. This happened because I treated each segments as completely separate line. Segment 4 had no line at all, as it consisted of one point only.

This made me think that I need to connect each segment with the previous one. The end point of one segment should be exactly the same as the beginning of the next segment. I duplicated first rows for all the segments (except the first one), adjusted segment and sequence number and then run all the rows through my original workflow.

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Alteryx Certified Partner

Most of it was pretty straight forward except for getting the continuous line, I had the logic in my head but trying to implement it caused a few re-works of the workflow

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16 - Nebula

like @nick_ceneviva@David-Carnes & @lminors (and most of the other folk) I took a few more steps to make sure the lines all touched by backing a copy of the last point of segment 2 back into segment 1

@ChristineB 's solution does the same, but WAY more elegantly than me :-)

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Alteryx Partner

Not sure I entirely agree that the solution provided satisfies the instructions given (adding that extra point to the segment). Fun nevertheless...

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8 - Asteroid

Solution attached.