I am using QGIS (2.8.6-Wien) and I would like to do the following: Load a GeoTIFF, add a grid-layer (with cell size specified in pixels), select some cells and save each cell content as an individual image (e.g. as a .png file).
Since I am not very experienced with QGIS, I am not sure whether this is actually feasible with QGIS. What I managed to do so far is the griding. Below is a small example, where I used the Natural Earth Admin 0 - Countries dataset. I did the griding with "Vector" -> "Research Tools" -> "Vector Grid", Parameters X: 4.0, Y: 4.0 (output grid as polygons).
Now, I would like to select the cell indicated by "X" (Panama) and save the cell content as an image. I tried some of the QGIS geoalgorithms (Vector selection tools) but failed to reach my goal. Ultimately, I would like to select several cells and save each cell as an image, individually.
Could anyone give me a hint?