The invention discloses a railway-line worker-
train positioning predicting and fragment-based caching strategy, and relates to the field of smart traffic. The strategy is characterized in that the fragment-based caching type positioning predicting strategy is realized through spatial
data processing in WebGIS-based railway application; the GPS real-time positions of workers or trains in a
railway line can be positioned on a railway kilometer post, so that the positions can be marked. The strategy mainly comprises the following steps: constructing a caching
block graph, namely, storing valid railway information into the caching blocks by fragments; loading and maintaining the caching blocks, namely, loading the caching blocks assigned by the GPS position in a cache, and maintaining the caching blocks in the cache on the basis of the use condition; predicting the caching blocks, namely, predicting the caching block which is possibly assigned in the next time, and loading and maintaining the caching block; and maintaining a caching
pool, namely, storing the caching blocks in the caching block
pool of the cache, wherein the use state information is stored in the caching block
pool and cleaned
on demand. With the adoption of the strategy, the
system function completeness is ensured, and the moving target positioning efficiency is improved.