一个简单的华南农业大学电子地图，dijkstra算法计算并绘制最短路径，预设数据计算路径长度，悬浮鼠标显示地点图片，自主课程设计题目。-A simple electronic maps of South China Agricultural University, dijkstra shortest path algorithm to calculate and draw the default data to calculate the path length, suspended mouse