Hello GeoNet Community.  I think I am going to like it here! ... View more

I am doing Flood routing and Dam Breach modelling of the Case study of ancient times which is 1000 years old.  I have a DEM of 30 m resolution SRTM and I want to modify its elevation so that the terrain can possibly resemble the old ancient terrain when there were no Bridges and Dams.  Are there any possible way to do that with ArcHydro??  ... View more

Hi there,  Would anyone explain to me how I unify the coordinate systems between GPS and Total Stations measurements in GIS? I have the satellite image of the area of interest. GPS data is matched with the satellite images in GIS, but the Total stations data does Not (it is very far from the area of interest). I want to visualise the differences between GPS and Total stations positions.    This is a summary of what I have done: 1- 20 points were observed by Leica GPS (example of GPS data: 177118.941, 34727.625, 86.568) 2- the same 20 points were observed again by total stations ( I assumed the coordinates of the first point is 1000,1000,1000, then the rest of points were measured relatively) 3- when I added the both measurement, spatial data from Total station appears in different location (far from GPS data) 4- I created a shape file and arc Catalog, to tell GIS that this data set is the same with the second data set, but it does Not work.   I would be so grateful if anyone would help, ... View more

All – I am in need of some assistance – I have a polygon area – Dam Inundation Area (Blue) And A polygon area of Census Block which includes population (Orange) I need to get a population estimate within the dam inundation area I am thinking that I will need to distribute the population somehow and then possibly an intersect?? Has anyone needed to do anything like this and can send some steps.  I do have spatial analyst extension if needed. Thanks, Cherie ... View more