Maxent jargon

It's our question: where our speices are present? which pixels are occupying in the area? each pixel will have a probability. 

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Determine what you know(=constraints)

1. Presence points (좌표)
2. Associated enviromental variables(환경변수)

Maxent vocabulary constraints

• Linear - variable itself
• Quadratic - variable squared
• Product - product of two variables
• Threshold - binary transformations(0,1) of a continuous variable using a threshold
• Hinge - like a linear feature, but constant below(or above) a threshold

Maxent algorithm

Statistical model: Gibbs probability distribution

map your data - what you have

That's why 

Location's of presence