GIS Work 3D Building Footprint

3D Building Footprints Digitization . Specification: 1. All building footprint need to be digitized including apartments, skyscrapers, commercial, residential, garage, shafts etc... 2. Floor wise splitting need to be done 3. Open area need to be removed from BFP. 4. Given images is top projected Ortho image so unwanted base movement is not required. 5. High planimetric accuracy is required (+/-0.5 meters) 6. In case Building is hidden due to adjacent building height then user need to update by taking reference from Google image 7. Building orientation must be according to provided images (90 degree angle). Maintain orthogonality in database 8. Juts & notches need to be create properly. 9. Shoe box is needed to be digitized. 10. Parapet Wall is digitized with buffer of (-0.2) in flat roof. 11. Ridge Building Should be splitted two times. 12. Slant Type building should be spiltted maximum no. of times 13. Group ID should be mentioned for one building one ID (i.e. which have numerous polygon ). 14. Building data format is ESRI SHP.