0
votes
0answers
32 views

Alternative to Snap (Editing) in QGIS/MapInfo?

Is there any alternative to Snap (Editing) in either QGIS or MapInfo (user-made tools), or another way to do this in ArcGIS without an advanced license?
0
votes
0answers
72 views

Methods to calculate Viewshed analysis

Does anyone know an algorithm to calculate Viewshed analysis? I calculated them in ArcGIS, MapInfo and SAGA GIS. I wish to calculate Viewshed analysis using algorithm or methods which I can use in ...
0
votes
0answers
122 views

MapInfo .tab file to .shp file intersecting polygons

I've received data from a contractor, they have provided it in both MapInfo tab file and shp file format. When I check the regions in MapInfo using the Check Regions tool one overlap between two ...
2
votes
1answer
107 views

St_buffer width issues

I am using postgres with postgis for spatial data and ArcGIS for visualisation. I am really confused regarding what units the st buffer function uses because when I insert just the value 1 as ...
3
votes
1answer
190 views

How to buffer a point by cardinal distances to create a polygon?

I am trying to buffer a point by distances in a table to create a polygon or line for example For a point with known x,y buffer based on the following radius: North= 20m East= 21.5m South= 14m West= ...
3
votes
4answers
3k views

How to calculate for every basin/sub-basin, drainage area at every elevation contour along stream?

With DEM as source, I created all necessary files like flow direction, accumulation,slope,streams,watersheds,pour point etc.... In my watershed(basin), I have many sub-watersheds(sub-basin) with ...
5
votes
1answer
327 views

50cm imagery - aerial or satellite?

The area of interest is 1450 km2. My options are: 50cm newly collected aerial natural color imagery for $28,300 OR 50cm recent archival satellite imagery (includes near IR band) for $20,600 The ...
6
votes
1answer
13k views

How to convert Mapinfo “.Map” file into an ArcGIS format? [duplicate]

Possible Duplicate: How do I convert MapInfo TAB and/or MIF to SHP? I currently do not have MapInfo but I do have a lot of ".Map" files that I need to convert for use in ArcGIS. Actually ...