Arcmap convert raster to vector how to#
Arcmap convert raster to vector download#

(Please note вЂ“ this blog is intended to be a personal diary of obstacles I am facing during my third-year dissertation.In a previous post, MicroDEM was used to create viewsheds from a DEM (digital elevation model), and plot them on top of either a DEM terrain image or a corresponding map loaded into the program. I shall report back in a few weeks to share how it went! I like the look of the ArcHydro idea, especially as IвЂ™m essentially editing the course of a river. ArcGIS is a sophisticated platform for spatial analysis and so there are workarounds which reach a similar conclusion. The toolbar would be excellent, but for me itвЂ™s unavailable. ItвЂ™ll also take a lot longer than the toolbar. There are a lot of steps that could go wrong, such as editing the wrong pixel values of the original raster when drawing the original vector polygon or incorrectly coding the polygon. This is a fairly basic workaround, and probably my next option after the toolbar. ThisВ solution takes advantage of some of the more sophisticated parts of ArcHydro, such as the fill sinks tool, flow line tracer and watershed analysis to ensure that the new DEM remains completely functional to analyse river flow correctly. Adding the results to your original raster allows the DEM to be edited. In my dissertation, this will involve coding a polygon in exactly the shape of the dam to have an exact height and then adding this new raster, with new elevation values, to the existing DEM.В On the same forum thread, вЂSIslamвЂ™ uses the attribute transfer toolВ to edit a vector and then convert to a raster.ДЄ similar solution, which is more water-tight (literally вЂ“ it uses ArcHydro to ensure water wonвЂ™t flow around the edited pixels), converts polylines to raster to create streams and polygons (or lines) to raster to create walls.

Arcmap convert raster to vector how to#

They describe how to create a polygon shapefile that covers the area that youвЂ™d like to edit, code their data values, convert to raster and then use Raster CalculatorВ from the Spatial Analysis toolbar to add (or subtract) the new values from your original DEM.

Arcmap convert raster to vector download#

This is by far my prefered option for my dissertation work, but is not downloadable on University computers and my personal computer canвЂ™t download ArcGIS.ДЄn Alternative Solution using Raster CalculatorД¬redit for this solution goes to вЂForestmanвЂ™ on this forum post.

ArcMap Raster Edit Suite in the process of editing individual pixel values (Image Credit: Here) The edit suite also allows the editing of multiple pixels at any one time to speed up Raster editing (or if you need to change a much wider area).

It can be downloaded from GitHub hereВ and, although has many bugs associated with it, offers a very simple way toВ edit pixel values by simply clicking on each pixel and overriding the data values that are already associated to it. This toolbar is an addition to the normal suite of toolbars offered by Esri in ArcMap. Editing raster data to this level of precision is not easy in ArcMap, but this blog post willВ explore someВ solutions that I have found and their relative advantages and disadvantages. This requires me to manually edit the z-values of pixels in myВ DEM (from SRTM). For example, my dissertation includes вЂњbuildingвЂќ a dam in the River XingГє where one doesnвЂ™t exist currently.

DataВ is split into a grid of cells and given aВ value such as x,y co-ordinates, elevation (z), or colour in satellite images.В Editing raster data allows for a new dimension of spatial analysis, whereВ hypothetical situations can be examined. Raster dataВ (in GIS) is made up of pixels, where each pixel is given a value.