Latest Contributions by SeanWineland

‎11-28-2017

I have the DEM model for the study area. I have gone through the step by step process of creating all of the various shapefiles in your flow chart above for the hydrology toolset and the arc hydro toolbox but I can't find any information on how to use your own points to delineate the watershed boundary. I need to only have the contributing area above this point for my analyses. Since this is possible in streamstats it has to be somehow possible using either archydro or this hydrology toolset. I tried using the point in the pour point feature as you suggested but this came out as just a white blank raster. I also tried using the tutorials on this website for the arc hydro toolbox Dr. Venkatesh Merwade's web page but I can't get the catchment polygon processing step to work using archydro. I've been trying to work on this for the past three days and nothing at all has worked out. If anyone could give any insight on to how to do this it would be greatly appreciated, it seems like such a simple thing that needs to be done but a whole lot of steps to get there.

‎11-28-2017

By custom points I just simply mean a sample location taken by me. A lat long coordinate. I want to determine the upstream watershed that contributes to all water in that watershed at that point. Is there any way to do this?

‎11-28-2017

I have gone through this process already and unfortunately there is nowhere to use custom points to delineate an upstream watershed boundary from that point.

‎11-28-2017

Hello, I am trying to figure out how to delineate an upstream watershed boundary from a single point feature. I understand that you can do this online using streamstats but this feature is unavailable in my state (WV). I have searched everywhere online for a guide/tutorial on how to do this to no avail. I have DEM data for my state and point features where I took my samples, I just need some guidance! Any help will be greatly appreciated

‎11-03-2017

I have not ruled it out, was just hoping to automate the process given that I have 67 individual watersheds I need to do this for. I guess I can go with digitizing to get started. If I union the digitized polygons with the watershed boundary would this allow me to calculate the percentage of area within the watershed covered by mining?

‎11-03-2017

I see, I do not have an arcgis online subscription anyways. My objectives are to somehow calculate the area of historical strip mining within individual watershed boundaries (I have shapefiles of watershed boundaries, and historical topo map files (DRG's). But this is proving to be quite difficult in every aspect. The DRG files I have downloaded are (.sid) files so I had to transform them into .tiff files to work with them. I'm currently trying to mosaic them together but this process has been running for 4 days now and I'm just really not sure if what I'm doing will work out. My professor thinks I can clip the mosiac to each watershed boundary and then run a supervised classification on the clipped image to extract areas of strip mining and non-strip mining, then perform a raster to vector on that image to calculate the area of strip mining. Any advice on how to achieve this goal would be greatly appreciated.

‎10-31-2017

Cody, I tried the link to the historical maps database but it did not work, i tried to sign in and it told me that I was not a member of this organization. Is it possible to run raster analysis on these basemaps? (supervised classification?)

‎10-29-2017

I have downloaded DRG's (.sid) files for the entire state of West Virginia, in hopes of mosaicking them together for use in my study of historical land use patterns within watersheds. My question specifically is how to mosaic them together seamlessly without the black and white backgrounds surrounding them currently. Below is an image of just all the raw files loaded and displayed in ArcMap. There are white areas where two images overlap and black areas as well (I turned off most of the black background in the symbology settings) A more fine-scale example below shows the same area with one specific layer turned on (left) and the same later turned on (right) Is there any way to mosaic these images together for a seamless product that could be used to clip to individual watershed boundaries and for digitizing features within those boundaries from this mosaic? Any help would be greatly appreciated!

‎10-29-2017

Curtis, Thank you so much for this information, I found DRG (.sid) files for the whole state I am working with. Any idea of how to mosaic these together? I will post another thread in this forum asking the same question. Thank you all so much for your help! xander_bakker‌ as well even though I might not be using the Python Script you came up with I appreciate all your help as well

‎10-28-2017

Okay, so I figured out how to open the files and actually successfully executed the extract by rectangle in Python. However, the output is just blank. So im thinking the bounding box coordinates are the extent of the whole image including the white collar? Not entirely sure. How would you successfully extract just the image?

‎10-28-2017

Thanks for your reply! I have never used python before, I have only ever done simple geoprocessing in ArcMap. Where do I find the .xml and .prj files and how would I do the transformation you are talking about?

‎10-28-2017

I have downloaded a lot of GeoTiffs of historical topo maps from the USGS (https://ngmdb.usgs.gov/topoview) at the 1:24000 scale. I am wanting to Mosaic these together to eventually clip to watershed boundaries, however the white collars on the outside are proving to be a headache. I have not been able to find a solid answer on these forums or anywhere else on the internet of how exactly to remove the collars. Does anyone have an answer? Any help would be appreciated!

‎02-06-2017

I should add that these .tif files all had black borders around them that I tried to take away by just changing the symbology, but I realize this may not be enough for when i run the mosaic to new raster function.

‎02-06-2017

I have a series of topographic maps by county that I am trying to merge together to use for a clip. I have tried using the mosaic to new raster function but the output gave me a merged image that is all jumbled up. The counties are not oriented properly (see attached images). I input the correct geographic coordinate system in the dialog window for mosaic to new raster function. So how do I fix it? It should look like the image where everything is aligned. Any help would be greatly appreciated!

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Date Last Visited	‎11-11-2020 02:25 AM

My Ideas

Latest Contributions by SeanWineland

Re: Upstream watershed boundary delineation from a point

Re: Upstream watershed boundary delineation from a point

Re: Upstream watershed boundary delineation from a point

Upstream watershed boundary delineation from a point

Re: Easy way to remove collars from GeoTIFF of USGS Topo?

Re: Easy way to remove collars from GeoTIFF of USGS Topo?

Re: Easy way to remove collars from GeoTIFF of USGS Topo?

How to Mosaic DRG (.sid) together?

Re: Easy way to remove collars from GeoTIFF of USGS Topo?

Re: Easy way to remove collars from GeoTIFF of USGS Topo?

Re: Easy way to remove collars from GeoTIFF of USGS Topo?

Easy way to remove collars from GeoTIFF of USGS Topo?

Re: How to merge .tif files into one image

How to merge .tif files into one image