Theory:

When the jet sprang into the sky,
it was clear why the city
had developed the way it had,
seeing it scaled six inches to the mile.
There seemed an inevitability
about what on ground had looked haphazard,
unplanned and without style
When the jet sprang into the sky.
Explanation:
 
The poet narrates the entire poem from the perspective of a person who is flying in a jet. The poet views the entire earth below from an aerial view and makes a few observations. It is generally difficult to comment or understand a particular problem with a viewpoint that is stuck in the same place. This is the reason why one must take a view from a third person's angle and have a detached perspective. The poet applies the same theory as he moves away from the land which is filled with people and is bustling with activities and looks at it from the top most position from a jet.
 
Screenshot 2021-04-05 233815.png
A flying jet
 
The jet springs up into the sky as it takes off slowly from the land. He slowly moves away from the bustling life on earth to a calm and quiet space. He looks down from the jet to see the city below him. He looks at the way it has been laid out and says that he understands why the cities have been laid out in a disoriented way, without sticking to a perfect plan. He understands that people give priority to their comfort and set boundaries more, compared to establishing perfection. The houses are put together in an unplanned manner which explains that there are a lot of people on earth whose primary focus is to survive and get access to basic essentials like food and shelter. The poet also clearly states that the city has developed just the way it is supposed to be. The people who wonder about the disarrangement of the plan of the city would understand the logic if they choose to just watch it from a different angle.
 
Screenshot 2021-04-05 233943.png
The earth, as seen from an aerial view
 
The poet says that it seemed that it was inevitable for the cities to be planned in a different way from the way it is put up right now. What seemed to be a strange, unplanned way to design the city seemed to make complete sense when viewed from a few inches away from the ground. The city seemed to be styled and planned in the right way by the creator, for the creations to live a life that would be logical and unperturbed.
 
Meaning of difficult words:
  
S.No
Words
Meaning
1
JetA fast plane
2
InevitabilityCannot be avoided
3
HaphazardWith no particular order
4
SprangTo jump quickly
5
BustlingNoisy and full of activity
6
DisorientedUnstable
7
PriorityMore importance
8
ComfortThe state of being relaxed
9
UnperturbedNot disturbed
10
DisarrangedNot in proper arrangement
Reference:
National Council of Educational Research and Training (2008). Honeydew. Geography Lesson- Zulfikar Ghose (pp. 34-235). Published at the Publication Division by the Secretary, National Council of Educational Research and Training, Sri Aurobindo Marg, New Delhi.