Redland-based Esri, the developer of mapping and GIS software, said Friday that it has acquired Maptel, a mobile application development company based in Melbourne, Australia. Financial terms of the buy were not disclosed. Esri said the buy will help provide field data collection capabilities and mobile application development expertise to its team. Maptel will remain in Melbourne, Australia. Maptel apparently has been developing applications which connect with Esri's tools for a number of years.