"終於"看了一些文獻之後，發現景觀生態裡講的「粒度」其實也不能來解釋空間解析度，只是概念很像。粒度(grain)是用來表現景觀的尺度，而空間解析度(spatial resolution)是用來表現影像的尺度。
譬如說matrix裡面的patch，是大榕樹、大灌叢和大湖的時候，粒度就比較大；是針葉樹一棵一棵，小湖一座座的時候，粒度就比較小。所以在數化的圖層上可以看到，有些地方泡泡小又密，一些地方泡泡比較大。
另一個表現景觀尺度的特徵，叫做幅度(extent)。那它的概念就有點像照片的大小，是3*5的還是4*6的這樣。
所以，當景觀的粒度小而幅度又不大的時候，需要更精細的工具去分析，那麼，低空攝影就派上用場了。
問題：
那粒度跟MPS(Mean Patch Size)又有甚麼相關呢?
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4 comments:
我認為MPS是一個區塊的計算指數，而粒度比較像是一個觀念。應該一個區塊裡面的粒度可能有大有小，而MPS是全部的平均值...這樣理解對嗎？
粒度GRAIN是指研究範圍中景觀元素的一般大小, 如農田, 廣場, 社區等LCTs的一般大小.
MPS是指"塊區"的平均大小, 要看指那一種塊區, 農田, 廣場或社區(Patch Level), 或一種塊區的全部(Class Level), 或全部種類的塊區(Landscape Level)的全部的平均大小.
所以要互相比較的話, 全部種類的塊區(Landscape Level)的MPS, 比較像是用來說明一個地景的GRAIN.
"嗯，你對"
『A finer-grained landscape has primarily small patches, and a coarse-grained landscape is mainly composed of large patches.』---LAND MOSAICS page 10
由許多patch構成的landscape裡，MPS小就是grain小。也就是形容一個landscape的細緻程度(質地)。
比如說一整片都是小灌木叢+狗屋的landscape，和一整片都是稻田+四合院的landscape。這樣形容對嗎?
接八塊學姐的話，如果一個區塊裡面的粒度有很大的也有很小的，要如何去計算它的grain?依最小的element為準嗎?
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