Latest Contributions by MarkBoucher

I just noticed the slowness when editing one layer with a 2' contour polyline layer on. When I turn it off the contour layer, the problem goes away. Certainly the snapping is "looking" around and has a lot to consider. Reducing the number of layers (features) that are turned on seems to help. ... View more

One idea is to simplify the polyline contours so there are not as many vertices, since accuracy is not that important. Search for simplify or generalization. There are tools not available to me right now for some reason. I have no idea if this will help with the number of topo points:  under Customize>ArcMap Options increase the number in the field circled in the image. Maybe there is another geoprocessing setting or other setting like this somewhere that will give you a higher limit of points. [ATTACH=CONFIG]25194[/ATTACH] ... View more

Kemal - Make sure the feature class has a defined coordinate system. ... View more

I've learned a few things since 2011. You can find tips that will help Arc Hydro work faster and with fewer errors/crashes at the link below my signature. ... View more

This is beyond my experience. However... According to this piece (http://webhelp.esri.com/arcgisserver/9.3.1/java/index.htm#geodatabases/raster_da22029934.htm) a raster can have one or more "bands". In images there are typically three bands (red, blue, green I believe). Maybe there is a way to create more bands with each one having data from you different raster datasets. After reading it a bit more, maybe what you want is a raster catalog (good link in second paragraph of the link above). You could convert your polygon layers to rasters so that all the data will fit in one catalogue with the rest of the rasters. Again, I have never done this, so someone else will have to jump in and guide you beyond this. ... View more

Model builder has iterate functions that allow you to iterate through each feature. I'd start there. [ATTACH=CONFIG]25074[/ATTACH] ... View more

Have you tried \Spatial Analyst Tools.tbx\Reclass\Reclassify? ... View more

People are going to accuse me of repeating myself... Set the Customize>Arc Map Options>Raster Tab>Maximum number of unique values to render" to a high number (see image). Uncheck "Enable" under Geoprocessing>Geoprocessing Option - Background processing Try running the process on the data on your C: drive if you are currently working over a network. These steps have helped me get past geoprocessing crashes. [ATTACH=CONFIG]25071[/ATTACH] ... View more

I did work along this line with mean seasonal isohyets which are basically contours of equal rainfall. The work is documented here: http://www.cccounty.us/DocumentCenter/Home/View/3914 ... View more

A similar recent post: http://forums.arcgis.com/threads/85518-Convert-Line-to-Dense-Points-Model-Builder ... View more

A similar recent post: http://forums.arcgis.com/threads/85814-Divide-Line-evry-100-Meters ... View more

Can you convert the line to a raster an then the raster to points? You will get points, but they won't be right on the line and lines at 45 to the raster alignment will get you a results you may not like; but then, maybe the result would still be usable for you. ... View more

then I got the Agree DEM but there's definitely sth wrong with my AgreeDEM, it's just the line... Nguyen, Was the result a ployline or a "line" in the DEM? It could be a DEM with an extreme value where the stream was burned and so it may just look like a "line". You can go to the properties>symbology tab and scroll to the bottom. Set the Statistics to be "From current display extent" and then zoom to an area where AgreeDEM should be defined by the stream is out of view. The color ramp should adjust to the view extents and you should see contrasts in the AgreeDEM like the oringinal DEM. You can also use the identify tool and click in areas away from the "line" where the AgreeDEM should exist and see if it is defined there. If AgreeDEM is not defined beyond the "line", it could be that your processing extent does not include all of your old DEM and was somehow changed to only include the stream ployline. Certain processes will change the processing extent without warning, don't ask me why. To make sure processing extent is what it should be, go to menu item Geoprocessing>Environments>Processing Extents and set the processing extents to match your DEM raster. Then try again. Let us know if this works for you. ... View more

Arc Hydro tools simply convert the polyline to a raster with a value. The value can be very big. You can make the value a little more than you need to "burn" a stream into the embankment. Then, Arc Hydro subtracts the polyline value from the dem. The fill sinks function fills in the stream to allow the flow direction to go downstream. You can do this without Arc Hydro. Draw a "stream" polyline through the embankment with the ends of the polyline where the low points are in the stream up and down stream of the embankment. Convert the stream to a raster with a high value, high enough the go below the embankment. (You may need to create a field in the polyline table for this value). Then, with with raster math, subtract your stream raster from the dem. After this, you use the resulting dem with the fill function and move on from there like you did before. Arc Hydro will make the "burned stream" more than one cell wide. You may need to do that, though I'd try doing it with whatever results the polyline to raster conversion give you. Seem like it should work. ... View more