Latest Contributions by RamB

Hallo, Finally I had time to work on this. I do not get euclidean shapes. I get proper anisotropic contours. Are you giving any cost raster as input ? I did not. I guess it get confused with cost raster if you use it. I just used DEM and a point file. It is a 32bit raster with 30x30 resolution. I changed to 5x5 resolution, that also works. Did I get you right ? regards, PS: extent gives a problem I think ... View more

The tool is basically calculating the cost according to distance, with no regards to the vertical factors I've put in. I'm working with a 5m cell size DEM as the surface raster and an ASCII table for the vertical factor. I understand you are going crazy 🙂 But if i am not asking for too much. Which vertical factors are you considering ? Please elaborate. Thank you. ... View more

Hi, is the second line a shapefile ? or a paper map ? what is the format ? regards, ... View more

Hi, I suggest you work with Aspect map (spatial analyst). For example let us say you are walking north, that is if you are on an average moving north compared to your starting point. Step1. Develop an aspect map of your study area. Step2. convert your walking path to a raster (path-raster), but of same size and extent as your study area. Such that cells beneath path are valued 1 and all others valued 0. Step3. Multiply your path raster with your aspect raster and get the output. Step4. In the output raster if the values are between 90 degree and 270 degree, then you are walking uphill. if the values are between 270 degree and 90 degree, then you are walking downhill. A negative value in your output suggests that you are walking on a flat surface. This is because you are walking north and the degrees are measured from north. If you are walking in any other direction, just play around with the degree ranges to get a solution. Let me know if you dont follow my english. regards ... View more

Hi, Topology is important to make sure that your lines are connected properly. If you are sure of the connections of lines or if you are sure of the quality of the source from where you have the shapefiles or feature class, then you can skip topology. You can proceed to defining connectivity 🙂 If you do not have any attributes, just start with shape_length so that your solution is based on shortest distance. You can easily convert the distance to speed by diving it by average speed of the mode. For example, if it is a walking network, just use the speed between 3 to 4 km/hr, if bicycle take 10-15km/hr. So time taken = (distance/ speed). Then you can use the same procedures for shortest time. regards, ... View more

I have seen others create multi-modal transit networks that utilized the route number as the elevation field so that the bus routes can remain over the street center line. Transfers, from bus to bus, bus to street, or street to bus, then take place "vertically." I am currently working on designing one myself for an accessibility study. The above comment is correct. I started doing such models since 2008, they all work !!! ... View more

Hi, Refer this for a slight improvement http://forums.arcgis.com/threads/17151-Shortest-Route-problem regards, ... View more

Hi, Some basic info you need 1. travel time on each link (this can be same for both directions, or you could create different travel times for each direction with two attributes) 2. one-way restrictions regards, ... View more