It has a slider bar and you can slide it to the different months/year that the last pic was taken. It may vary over different areas but it usually goes like 11/2018, 3/2018,12/2016, 5/2016. Not usually month to month, it kinda jumps around some but it cane still be helpful.When using good earth pro, how exact does the historical imaging work? Can I just pic a time of year and see that area? I want to use it to identify oaks by looking at the time of year when leafs change.
The pic quality of individual dates can vary a lot. Even on pics taken during the same month (of different years) can really differ. Must be from atmospheric differences on at the time the image was taken?It has a slider bar and you can slide it to the different months/year that the last pic was taken. It may vary over different areas but it usually goes like 11/2018, 3/2018,12/2016, 5/2016. Not usually month to month, it kinda jumps around some but it cane still be helpful.
Most of the imagery you see is from aerial photography and the resolution is a function of the altitude of the airplane when the photos were taken. Flying at a lower altitude creates better images but, takes longer to collect and process the data because it requires more photos to cover the same area. Because the imagery GE uses is imagery collected by different organizations for different purposes it's at different resolutions. That's also why you can pan around and find edges where the coverage of one imagery set ends and imagery of different resolution/dates begin.The pic quality of individual dates can vary a lot. Even on pics taken during the same month (of different years) can really differ. Must be from atmospheric differences on at the time the image was taken?
How do you get that shading on cal topo? Do you use that for any other fine tuning?What's your method? Here is mine
Where I Begin
Then, depending if I'm hunting in hilly terrain or flat:
- My favorite, and where I ALWAYS start, is with google earth pro - specifically, I use the historical imaging feature and vacillate images between multiple time periods. This allows me to see high/low water, spring/summer, fall/winter etc. Some areas have more updated images than others but for river bottoms in particular, I've found a specific time-period that tells me a lot about bedding/travel.
- I like Hillmap to compare/contrast as 7.5min topo to sat view. This provides side-by-side comparison (better to determine combined elevation/terrain of certain patterns that I like). However, it's best (IMO) in areas w/elevation changes that warrant the addition of the 7.5min topo ...and not as valuable in the flatlands.
- In some of the river bottoms I hunt, they can go 5-10 feet under water fairly quickly. I tried, forever, to work w/the Arkansas GIS department to build a topo map w/3' contour intervals vs the standard 20' on a 7.5min topo. Finally, I found DEM [Digital Elevation Model] shading on Caltopo.By using this function, I can essentially create my own elevation map on 1meter (~3') intervals. The elevation changes are color coded.This is especially useful in knowing; do I need a boat, can I get through with knee boots, hip boots, chest waders, will this elevation support oak tree growth etc.
Deal might still be going and perhaps I should have posted in the coupon/discount section
- I use ONX while I'm hunting (lots of private inholdings on some of the public I hunt). Also, based on where I live in NE AR, I have access to several states w/in 1-3 hours (AL, AR, IL, KY, MO, MS, TN). Just upgraded onX ELITE for $59.99 (All 50 state sale via camofire this past week - May 16)
- NOTE: If you are not hunting in an area where understanding property boundaries is critical, there are likely better options than onX IMO. This is my go to as I hunt mainly public w/private inholdings so knowing where I am at all times is critical.