Where to start? The process below should help you decide what kind of aerial imagery you need and how to acquire it. You’ve got a few choices of satellite and aerial orthophoto. Answering a few ques...
resolution
How zoomed in can the image be before it looks blurry?
How Does Image Resolution Relate To Map Scale? First, 20cm imagery is not the same as 1:20 map scale. Maps are created with mix and match combinations of data sources. Each source may be fine on its o...
How are orthophoto and satellite imagery different?
Each sensor vehicle is different. In general, the level of detail seen in the image and geolocational accuracy will be better for orthophoto flown from aircraft. Satellite imagery is superior in that ...
How detailed are the images?
The amount of detail depends on the image resolution. Resolution in cm refers to the area on the ground covered by each pixel in the image. In an image with 15 cm resolution, for example, each pixel...
Why doesn’t the property boundary line up perfectly with the orthophoto?
The orthophoto are generally spatially accurate to double the resolution value. Simply put, if a photo has resolution of 20cm, any point on the photo will be accurate within 40 cm of its true location...
What’s the positional accuracy of the orthophoto?
It depends on the photo resolution. Whatever the stated photo resolution in cm, positional accuracy is double that value. A 15 cm photo, for example, has positional horizontal accuracy of +/- 30 cm. T...
What does the photo resolution in cm mean?
Resolution in cm refers to the area on the ground covered by each pixel in the image. In an image with 15 cm resolution, for example, each pixel covers a patch of ground 15cm x 15cm in size. Objects o...