an example of the ``circle of viewpoints'' visible thinking strategy
{"Image Make": "Apple", "Image Model": "iPhone 6", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "9.1", "Image DateTime": "2015:11:19 14:27:41", "Image YCbCrPositioning": "Centered", "Image ExifOffset": "186", "GPS GPSLatitudeRef": "N", "GPS GPSLatitude": "[38, 53, 296/25]", "GPS GPSLongitudeRef": "W", "GPS GPSLongitude": "[77, 0, 959/100]", "GPS GPSAltitudeRef": "0", "GPS GPSAltitude": "15263/880", "GPS GPSTimeStamp": "[19, 27, 38]", "GPS GPSSpeedRef": "K", "GPS GPSSpeed": "0", "GPS GPSDate": "2015:11:19", "GPS Tag 0x001F": "65", "Image GPSInfo": "1590", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "1930", "Thumbnail JPEGInterchangeFormatLength": "11139", "EXIF ExposureTime": "1/30", "EXIF FNumber": "11/5", "EXIF ExposureProgram": "Program Normal", "EXIF ISOSpeedRatings": "32", "EXIF ExifVersion": "", "EXIF DateTimeOriginal": "2015:11:19 14:27:41", "EXIF DateTimeDigitized": "2015:11:19 14:27:41", "EXIF ComponentsConfiguration": "", "EXIF ShutterSpeedValue": "5845/1191", "EXIF ApertureValue": "7801/3429", "EXIF BrightnessValue": "17198/1305", "EXIF ExposureBiasValue": "0", "EXIF MeteringMode": "Pattern", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "83/20", "EXIF SubjectArea": "[1631, 1223, 1795, 1077]", "EXIF SubSecTimeOriginal": "509", "EXIF SubSecTimeDigitized": "509", "EXIF FlashPixVersion": "", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "1535", "EXIF ExifImageLength": "1941", "EXIF SensingMethod": "One-chip color area", "EXIF SceneType": "0", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF FocalLengthIn35mmFilm": "29", "EXIF SceneCaptureType": "Standard", "EXIF LensSpecification": "[83/20, 83/20, 11/5, 11/5]", "EXIF LensMake": "Apple", "EXIF LensModel": "iPhone 6 back camera 4.15mm f/2.2"}