土地利用数据在不同空间尺度下的精度研究

Study on the Precision of Land-use Data in Different Spatial Scale

目前大部分土地利用图都是由不同的比例尺所组成,在对两个不同年度的土地利用数据进行变化研究时,如果手中拿到的两个不同年度的土地利用数据是在不同空间尺度下获得的,这时要想对它们进行土地利用变化研究就会有一定的困难,就需要把它们转化到相同的比例尺下。具体在同一时间尺度下不同空间尺度的土地利用数据中各种土地利用类型的精度损失情况是怎么样的呢?本文对广州市海珠区在1:2000、1:5000、1:10000几种比例尺下的土地利用数据进行了分析研究,最后得出每种地类的精度损失情况。

At present most land-use maps are built up in different spatial scale. When we study the land-use change in different time scale, if the data we have is not only in different time scale but also in different spatial scale, we have to do some scaling to make them in the same spatial scale. Then we can study the land-use change using the scaled data. Before the scaling we have to identify the loss of precision in the land-use data which is in different spatial scale and the same time scale. Taking the land-use data of Haizhu district of Guangzhou city as an example, this paper analyzed the land-use data in different scale of 1：2 000, 1：5 000 and 1：10 000. Finally, it summarized the loss of precision of different types in the land-use data.