Drone Map vs J

一、本圖資查詢系統，係由交通部民用航空局（以下簡稱民航局）及直轄市、縣市政府（以下簡稱縣市政府）依「民用航空法」第99條之13第1項及第2項公告之圖資資料匯入，並僅供參考用，如有與公告資料不同處，以公告資料為準。 二、本圖資查詢系統所揭示之範圍或區域，並無排除其他法規之適用（如國家公園法、商港法或其他法令等，請洽詢相關主管機關），如有問題歡迎與民航局聯絡（電話：02-23496284）。 三、本圖資查詢系統所揭示之範圍或區域，區分為下列三類： （一）民航局公告之禁航區、限航區、航空站或飛行場四周之一定距離範圍。 （二）縣市政府依公益及安全需要公告之禁止或限制區域。 （三）中央主管機關提請所在地縣市政府公告之禁止或限制區域。 四、政府機關（構）、學校或法人如有申請至禁止或限制區域內從事活動需求者，應先取得相關主管機關同意。前述相關主管機關之聯絡資訊，請至遙控無人機管理資訊系統內（https://drone.caa.gov.tw）以政府機關（構）、學校或法人帳號登入後，至活動區域範圍內查詢。 五、於活動之範圍或區域內從事遙控無人機飛航活動時，操作人應依「民用航空法」、「遙控無人機管理規則」及相關法令從事遙控無人機飛航活動。 六、使用者可用滑鼠點選圖上任一位置，即可瀏覽相關詳細資訊，或利用左上方查詢欄位，可輸入地址或經緯度，亦可瀏覽相關資訊。 七、版本宣告：本圖資查詢系統係依111年12月28日前，交通部、國防部、民航局、縣市政府公告或提供之圖資資料。

J-Camera is an inspection tool, not a general-purpose camera. It is built for one job: looking closely at small things — a solder joint, a hairline scratch, a serial number, a fabric weave — with the torch on and real control over focus. SPLIT-IMAGE FOCUS A circle sits in the centre of the frame. Inside it, the live image runs through an edge-enhancement formula and is shown as four quadrants at four different strengths. Bright scenes need a gentle setting; dim ones need a strong one — instead of guessing, you see all four side by side and pick the one that reveals detail. Press and hold to cycle through five formulas. FREQUENCY HISTOGRAM A logarithmic frequency plot, not a brightness histogram. When the right-hand side stays high, fine detail is still present — which is what "in focus" actually means. It is the difference between believing you are sharp and knowing it. FOCUS YOU CAN DRIVE Tap anywhere to move the focus point. Switch to manual and drive the lens by hand. The focus ring is grey while the lens is moving and red once focus is locked — no text to read, just a colour. READOUTS THAT STAY READABLE Shutter, ISO, zoom and focus are drawn as the inverse of whatever is behind them, measured live. On a blown-out white surface the text turns black; on a dark one it turns white. Nothing is dimmed to make room for it. MANUAL CONTROL Shutter, ISO, colour temperature, tint, focus distance, zoom and exposure compensation. Each control shows whether it is on Auto or being held. Anything the current lens cannot do is greyed out rather than failing silently. PORTRAIT DEPTH On devices with more than one rear camera, portrait mode measures depth and simulates a shallow depth of field, with a live aperture slider. Two windows show the depth map and the blur mask actually being applied — you can see what the machine measured, not just the result. Each shot saves two photos: one with the original pixels and the depth map, which the Photos app can re-edit with its own aperture slider, and one with the blur already applied. LiDAR CALIBRATION On models with a LiDAR scanner, record a few reference distances and the focus-distance readout becomes real units instead of an estimate. Five languages. No account, no sign-in, no data leaves your device. J-Camera is free and supported by occasional full-screen ads shown after a photo is saved — never while you are framing or focusing. Ads are non-personalised; the app does not ask for tracking permission.