ADS Capstone Chronicles Revised

6

To facilitate faster access to the JSON and image data from S3, files will be downloaded to the user’s local path. The JSON files are structured into two main sections: features and metadata. The features section contains polygon coordinates (xy), latitude, and longitude information, while metadata includes details about the images, disaster type, and filename. Table1 xView2 JSON Format Data Structure

Polygon in WKT format in image coordinate system

xy[].wkt

Name of the sensor used to capture the image

4

sensor

provider_asset_t ype

5

Type of asset provider

Ground sample distance (resolution of the sensor, in meters) Timestamp for when the image was captured, in ISO 8601 format Angle between the sensor’s optical axis and the nadir (vertical direction) Resolution of the panchromatic (black-and-white) band of the image, in meters

6

gsd

#

Field Path

Description

7

capture_date

1

img_name

Filename of the image asset

Geographic coordinates of features in longitude and latitude format

lng_lat

8

off_nadir_angle

lng_lat[].pr operties

Metadata about each feature

9

pan_resolution

lng_lat[].pr operties.feat ure_type lng_lat[].pr operties.sub type

Type of the feature (e.g., "building," "road")

Angle of the sun measured clockwise from north

10 sun_azimuth

2

Angle of the sun above the horizon

11 sun_elevation

Specific subtype of the feature, indicating condition or type

Target angle measured clockwise from north

12 target_azimuth

lng_lat[].pr operties.uid

Unique identifier for the feature

Name of the disaster event that prompted the data capture

13 disaster

Polygon in well-known text (WKT) format representing the feature geometry

lng_lat[].wk t

14 disaster_type

Type of disaster event

Catalog ID of the asset in the data provider's catalog

Image coordinate system representation of the features

15 catalog_id

xy

Original width of the image, in pixels

xy[].propertie s

Metadata about each feature in the image coordinate system

16 original_width

Original height of the image, in pixels

17 original_height

xy[].propertie s.feature_ type xy[].propertie s.subtyp e

Type of the feature (e.g., "building," "road")

3

Width of the processed image, in pixels

18 width

Specific subtype of the feature, indicating condition or type

Height of the processed image, in pixels

19 height

xy[].properti es.uid

Unique identifier for the image asset

Unique identifier for the feature

20 id

272