The image is a whiteboard with a flowchart drawn on it. The flowchart is titled "Spot height (X,Y) Digital Elevation Model" and it appears to be a visual representation of a digital elevation model. 

The flowchart consists of several boxes connected by arrows, each box representing a different step in the process. The first box is labeled "Y1-5", the second box is labelled "Y2-2", and the third box is numbered "Y3-3". The arrows indicate the direction of the flow of data from the first box to the next box.

There are also several lines connecting the boxes, which represent the data points. The lines are labeled with numbers and letters, and there is a legend at the bottom of the image that explains the meaning of each line. The background of the whiteboard is a light blue color, and the text is written in both Thai and English.