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location Utah, USA
age 34
visits member for 2 years, 5 months
seen 12 hours ago

GIS Analyst


Apr
16
comment How do you calculate the area of polygons which overlap a buffer around a point?
The only way I can think of to do it is programmatically, unless you separated each nest buffer by a query or export, and ran an intersect on each iteration. Not sure how to do either of those methods in QGIS though. Hopefully, some gurus will chime in. Good luck!
Apr
16
comment How do you calculate the area of polygons which overlap a buffer around a point?
Do your nest buffer zones overlap each other? If so, then in effect you want to run an intersect of ponds with each nest buffer, right?
Mar
12
comment How combine different geometry types into the same feature class
Why do you need them together? What calculations/display/analysis do you want to perform that requires them to be in the same layer? If we know what you are trying to do, then we may be able to come up with better alternative solutions.
Feb
4
comment Model Builder: Enable / Disable parameters based on Conditions / Preconditions
So, you want the tool to gray out a parameter input when the checkbox is unchecked, and then to ungray/allow it when it's checked?
Jan
21
comment How to split lines at vertices in ArcGIS for Desktop with Basic level license?
GME has a Polygons to Polylines tool as well. So, it's got you covered either way. QGIS also has a Polygons to Lines tool.
Jan
21
comment How to split lines at vertices in ArcGIS for Desktop with Basic level license?
If ET-GeoTools doesn't work as you would like, then you might try the Geospatial Modelling Environment add on, which has the Polygons to Points tool. GME supports Arc 10.0/10.1, but not 10.2 yet. Extract Nodes in QGIS can also be a fall back.
Jan
21
comment How to split lines at vertices in ArcGIS for Desktop with Basic level license?
So, you don't have the license level to use Split Lines At Vertices, but you still want that functionality in your model? Or you want to use other tools in your model that accomplish the same thing, but don't require the Advanced license? I'm not sure that's possible in an automated way using just ArcGIS.
Jan
15
comment Extend Polyline in ArcGIS without intersecting line
A similar approach to this would be to use the Continue Feature Tool to extend a line. Right click and use Direction/Length to extend the line. Then just Flip the line and extend the other end of the line as well.
Jan
14
comment How to achieve Gradient Fills in ArcMap?
Do you just want the gradient effects in map 1? Or do you want the shadow/halo effects as well? The shadow effects have a Photoshop look to them.
Jan
13
comment How do government agencies come up with their data dissemination policies (and fees)?
It depends on the state and the individual county. It's a case by case basis. For example, Utah has a state agency called the AGRC that is a repository of GIS data and it provides it for free to the public. Each county in the state is responsible to send the AGRC up-to-date data periodically that they can add to the geodatabase.
Jan
10
comment Problem while inserting an object into ArcMap
Is Nod32 an anti-virus software? Can you disable your anti-virus temporarily to test? Also, if you use Insert-Object-Pdf, I don't think ArcMap supports having full control over various layers in your pdf. I think it comes up as more of a static image.
Jan
9
comment Problem while inserting an object into ArcMap
Free Adobe reader does not support that. It can convert to text files, Word, or Excel. However, GIMP (free) does support converting pdf to jpg, png, etc.
Dec
18
comment How to find matching pixel values in seperate rasters
Since the two rasters don't overlap at all, I'm not sure how you would overlay/compare them. In essence, you want to place the two on top of each other and mark any cell between the two that has the same RGB value. So, these two rasters are identical in dimensions?
Dec
18
comment What is the best way to ortho-rectificate image from the plane?
Are you trying to eventually create a mosaic? Or do you want the images all separate?
Dec
5
comment Problem with running Python scripts in ArcMap
Can you run commands in your Python Window in ArcMap? Can you run even a basic script?
Dec
3
comment Calculation of Euclidean Distance
@whuber - I don't think the Euclidean Distance tool GeoGhost mentioned in Spatial Analyst would work. Basically, it would convert your two points to a raster with two source cells and everything else as NoData. Then, it would create a new raster with the extent of the two points that calculates the distance from each cell to the closest source cell. It doesn't calculate the distance between the two points. So, I don't have a clue how you would do that with rasters either.
Dec
3
comment Merge multiple feature datasets while maintaining shapefiles for respective point, line, and polygon files nested ArcGIS
Are you wanting to merge multiple point shapefiles together, then line shapefiles, then polygon shapefiles? The shapefile format doesn't support merging different types of shapes. Also, are all your shapefiles using the same projection? And do they have the same attribute table schema? All of these things need to be in order for a proper merge to occur.
Nov
1
awarded  Yearling
Oct
30
comment Python scripting for making rings from the city center
What I'm getting at is there should be city blocks that fall within two buffer rings. I.e., they overlap in both the 1 km and 2 km rings. How do you want to resolve that? Do they get the closer value or the further value assigned to them. For example, Evil Genius' script example gives priority to closer values. So, if a polygon overlaps ring 1 and 2, it will be given a value of 1. Not sure how else to explain it.
Oct
30
comment Python scripting for making rings from the city center
Huh? I'm talking about what final value do you want placed in your "ring" field. E.g., if a city block falls within ring 1 & ring 2, what value should get priority, or overwrite the other?