When you see the picture of the camera with the slash through it on your map, it means that satellite images for this area are unavailable at that altitude.
For example, there may be images at 1.6KM altitude but not at the 1KM setting or closer. This varies from place to place. A lot of this has to do with what the weather is like or the time of day when a photo satellite is passing over and doing a “sweep”. If it is night, no usable photo can be taken, and the same goes for heavy cloud cover. In time, surely closer images will become available. If Bing comes to your town, a bird’s eye view might also become available.