microsoft
Download NAIP Imagery
Issue
How to download NAIP imagery for Chesapeak13? Labels for Chesapeake13 are downloaded automatically, but there is no information, how to download correspond NAIP imagery. In tutorial, there is link to blob to download 4 particular raster, but what about the rest?
Fix
I suggest to add this information to documentation.
Setting dataset = Chesapeake13(root="data", download=True) downloads the labels and imagery. Are you sure it didn't download the imagery? I just tested and it works fine for me.
The root directory should contain the following files after downloading:
I think it is only mask of 13 classes. It does not contain any imagery. Chesapeake 13 inherits from Chesapeake, where here it says, it is no imagery dataset. Moreover,
$ gdalinfo Baywide_13Class_20132014.tif
Band 1 Block=128x128 Type=Byte, ColorInterp=Palette
Min=1.000 Max=12.000
Minimum=1.000, Maximum=12.000, Mean=3.588, StdDev=1.478
NoData Value=0
Overviews: 249563x439170, 124782x219585, 62391x109793, 31196x54897, 15598x27449, 7799x13725, 3900x6863, 1950x3432, 975x1716, 488x858, 244x429
Metadata:
RepresentationType=THEMATIC
STATISTICS_COVARIANCES=2.184897016039103
STATISTICS_MAXIMUM=12
STATISTICS_MEAN=3.587997581131
STATISTICS_MINIMUM=1
STATISTICS_SKIPFACTORX=1
STATISTICS_SKIPFACTORY=1
STATISTICS_STDDEV=1.4781397146546
Image Structure Metadata:
NBITS=4
Color Table (RGB with 16 entries)
0: 0,0,0,0
1: 0,197,255,255
2: 0,168,132,255
3: 38,115,0,255
4: 76,230,0,255
5: 163,255,115,255
6: 255,170,0,255
7: 255,0,0,255
8: 156,156,156,255
9: 0,0,0,255
10: 115,115,0,255
11: 230,230,0,255
12: 255,255,115,255
13: 197,0,255,255
14: 0,0,0,255
15: 0,0,0,255
Which tiles should I download to match these 13-class labels? What is the purpose of NAIPChesapeakeDataModule, if it downloads Chesapeake13 labels, but no NAIP Imagery?
Ah I see what you mean. The purpose of the dataset is to be combined with NAIP or any other image dataset that has overlapping areas so that you can retrieve image and masks together. Maybe @adamjstewart or @calebrob6 can answer where the imagery can be downloaded other than from any of the numerous online NAIP sources.
Thank you for clarification! My intention is to get exact imagery, on which the labeling (Chesapeake13) was done. Could be those from ChesapeakeCVPR zip?
@calebrob6 created the ChesapeakeCVPR dataset so he may know.
As @isaaccorley mentioned, the purpose of Chesapeake13 and NAIP is for training models and making predictions, not for benchmarking purposes. Those datasets are uncurated collections of imagery and masks.
It's possible that no NAIP tiles overlap and all Chesapeake labels were generated from a single year of imagery, in which case downloading all NAIP tiles that cover the states in Chesapeake would be enough to reproduce the dataset. But @calebrob6 is the expert on this one.
