By stitching together the so-called "evacuation orders" issued by the Israel Defense Forces, it is possible to see just how much of Gaza Israel has already taken.

Fearing an Israeli onslaught could come soon, some Palestinian families began leaving eastern areas of Gaza City, now under constant Israeli bombardment, for points to the west and some explored evacuating further south.

Thousands have fled parts of Gaza City in recent days amid airstrikes and advancing Israeli troops, new satellite imagery shows. Israel's advance comes as it prepares to mount a full-scale invasion of the city,