Several GB orthophoto, but in order to load quickly, it is necessary to build an image pyramid in advance. Although the pyramid will be built automatically when loading, the pyramid construction speed is too slow due to the underlying algorithm. The young man found that if you use other GIS platform professional software, such as ArcGIS or SuperMAPGIS, create the pyramid in advance and then load it with EPS, the speed will be swish. Because EPS loads hierarchical pyramid data, it can realize fast loading and smooth browsing of large pictures. At the same time,

EPS is a simple and easy-to-use aerial mapping software, which supports vertical photogrammetry, oblique photogrammetry and laser point cloud mapping. As a mature terrain element editing software, the retrieval of national standard symbol library and the editing of basic vectors are the two most basic and commonly used functions in surveying and mapping. Its terrain element coding supports the derivation of CASS schema, which is a great advantage of the software itself.