ArcGIS refers to a family of GIS software from Esri which includes desktop (ArcReader, ArcMap, ArcCatalog), server applications (ArcGIS Server), mobile devices (ArcPad, ArcGIS Mobile) as well as online services (ArcGIS Online).
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755 views
How does Nearest Neighbor Image Resampling work in ArcGIS?
Hi I am trying to understand how nearest neighbor for the resampling of Image datasets works in arcGIS.
The output raster cell value is the value of the closest cell value in the input raster:
...
12
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6answers
624 views
Should I use File Geodatabase (*.gdb), Personal Geodatabase (*.mdb) or shapefiles?
I am a bit confused on the topic of databases. For me, this far, I have used databases as an easy way to keep all files together rather than having dozens of shapefiles all over the place. And it's ...
12
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3answers
867 views
Are the ESRI .lyr and .mxd data format specs published?
Are the binary formats of .lyr and .mxd files published?
12
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5answers
3k views
Use arcgis with SQL Server 2008 as a backend
I'm wondering how best to use arcgis] and sql 2008 together. At the moment we run manual imports and exports between sql 2008 and arcgis 10 shape files. With sql 2008 having a geography data type I ...
12
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3answers
365 views
How are people using Python data structures and classes in Arcpy?
This question may expose my ignorance on programming but I'm curious about how people are using different python data structures within Arcpy.
This page lists the data structures in Python. I ...
12
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5answers
4k views
How to get the extent of each polygon in a shapefile?
In arcgis 10 and python I want to get the extent (xmax, ymax, xmin, ymin) info of each of the polygons in a shape file.
I can get the extent of the whole shape file using
...
12
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2answers
497 views
Raster noise reduction and edge smoothing
I have a raster image like this
I want to delete the isolated noise point and smooth the edge (say the white single points, and I want the edges of the entity look smooth). How can I do this in ...
12
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6answers
3k views
Bulk field rename in file geodatabase
I have a file geodatabase with several hundred feature classes in it.
Some feature classes have a field that got named incorrectly, and it got named "SCHEMA_FEATURECLASS_ENTITY" instead of just ...
12
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6answers
989 views
What's an efficient way of detecting road junctions on a map?
I may receive maps from any source for my project, and for the C++ algorithm I'm making, it's imperative for the algorithm to know where road junctions (nodes where more than two road segments meet) ...
12
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3answers
6k views
Will ArcGIS 10 support Python 2.7 or Python 3.1?
I'm curious to know whether ArcGIS 10 will support newer versions of Python than 2.6. And for that matter newer versions of NumPy (ie, 1.4, 1.5 etc). I'm sure that this documentation is on the ESRI ...
12
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2answers
4k views
How to convert an .mxd file to a .qgs file?
I recently tried to use QuantumGIS and I wondered if you can turn in a draft format ESRI mxd loadable qgs. This would avoid thematize the entire project.
Thanks for your help.
12
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2answers
220 views
File organization for sharing ArcGIS python code
What is the best organizational structure for sharing ArcGIS python code and geoprocessing tools? Or even, are sharing code and sharing tools separate questions?
Esri has a Methods for distributing ...
12
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4answers
3k views
No way to De-authorise ArcGIS Server? How to get license back?
At v10 of ArcGIS Server, from what I understand of the new license model, it is not possible to de-authorise ArcGIS Server (like you can with Desktop)
Clients have visibility over their licences with ...
12
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3answers
275 views
How to determine if trees within forest gaps are clustered?
The attached dataset shows approximately 6000 saplings in approximately 50 variable sized forest gaps. I am interested in learning how these saplings are growing within their respective gaps (i.e. ...
12
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3answers
890 views
Future of spatial databases
It may be a bit off-topic. I am eager to know the industry specific importance of Spatial Databases.
Is Spatial Database a very important part of any GIS system? Or will we use other technologies to ...
12
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3answers
479 views
How to implement ringmaps in ArcGIS?
In a recent article by Stewart and colleagues in IJHG I stumbled upon interesting technique of visualizing data using ringmpas. Some more information referenced in the article about this technique ...
12
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1answer
228 views
How can I utilize NumPy arrays to optimize big data geoprocessing?
I'm interested in learning how to utilize NumPy arrays to optimize geoprocessing. Much of my work involves "big data", where geoprocessing often takes days to accomplish certain tasks. Needless to ...
12
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2answers
212 views
Arcpy adds erroneous interior ring when writing adjacent, multipart geometry
I've run into an odd issue when using Arcpy to write multipart geometry to a shapefile. I am using an InserCursor to create a multipart feature from a list of parts each with a list of vertex pairs. I ...
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2answers
459 views
ArcGIS Buffer accuracy problem
world,
once again I encounter something very strange with ArcGIS. I perform a buffer analysis on one side of a polyline. There seems to be a serious accuracy problem and I can't figure out what the ...
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3answers
1k views
Do ArcGIS SpatialReference object factory codes correspond with EPSG numbers?
I've got a project where I'm reading in geometry objects from text files to put them in ArcSDE. These geometry objects have an associated EPSG code, and I'm looking for a way to ensure they're in the ...
11
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3answers
531 views
Is PhD in GIS useful in non-educational career path?
A bit of an open debate - I am curious for your opinions. I am considering commencing a PhD in GIS which may concern the application of surveys within the natural environments. Eventually, I wish to ...
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4answers
1k views
What are data visualization and analyses pros/cons of QGIS over ArcGIS?
Many of my colleagues use GIS on a very sporadic basis for simple data visualization and basic analysis (clipping, buffering, etc.) and I am hoping to transition these non-core GIS people to QGIS so ...
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6answers
635 views
how to improve rendering performance of very large shapefile?
I have a polygon shapefile that has a 100MB .dbf and 500MB .shp file component. The reason it is so large is it is a landbase classification for a whole district.
Everytime I am viewing the file in ...
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7answers
2k views
How to obtain overlapping semi-transparent circles effect?
I have been trying to obtain the following markers effect. How can I do the same in ArcGIS (or any free software)? This image is from a book.
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3answers
406 views
Modelling of rent prices - which interpolation method should I choose?
I have national dataset of ~1,4 million households. There I have information about rent, size (number of rooms and m2) and some additional characteristics of each household.
I'd like to use this data ...
11
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1answer
93 views
Watermarking photos using their geotag and create a shapefile
I have geotagged photographs and I would like to place a watermark of the photos location on the front for easy reference as well as creating a shapefile from the coordinates. Does anyone know of any ...
11
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1answer
581 views
How can I display raised error messages to the user in the ArcGIS geoprocessing results window?
Question:
Can print statemnts raised from a custom exception be displayed in the gp results window?
Background:
I modified a script that I found that takes two inputs from a user, finds the ...
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2answers
3k views
Free tool to convert .lpk to .shp file
I have a .lpk file from ESRI that I would like to convert to a shapefile. How can I do this, using only free software?
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1answer
1k views
Why do simple joins on small datasets slow down ArcMap so badly?
ArcGIS 9.3.1, ArcInfo. I have some small file geodatabase and SDE featureclasses (few thousand records each, 50 columns) that I am doing attribute joins on. After the joins, drawing of the map is ...
11
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1answer
441 views
Stop ArcMap from probing missing data sources on launch
When migrating a map from one environment to another (say, from an existing client environment to our development environment) we're often given MXD documents that represent the map. These documents ...
11
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4answers
768 views
ArcGIS - How do I group corner-touching contiguous polygons?
Using ArcGIS 10, I have a Feature Class which I converted from a Raster (GRID) (Raster To Polygon Tool).
There are approx. 180,000 polygons.
The attribute table contains a [grid_code] field which ...
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0answers
514 views
How to Split a Concave Polygon Into Convex Polygons in Arcpy?
I'm looking for a tool or algorithm to detect concave polygons and split them into convex polygons. Like explained in the picture, the blue polygon is split into A and B polygons
I'm using Arcpy ...
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5answers
11k views
How do you cite ArcGIS?
When writing papers, is there a standard style that should be used for citing ArcGIS, specifically ArcMap? In particular, how do you reference a specific tool that you used in your analysis. I'm not ...
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1answer
939 views
Can ArcGIS 9 and 10 coexist peacefully on same computer?
We have a copy of Hawths tools that only work in ArcGIS 9.3, so I would like to keep it on my computer. However, most of the work we do in our lab is done with ArcGIS 10.
Therefore, would it be OK to ...
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6answers
381 views
Free / Open source GIS Education sources
I'm looking for free / open source GIS education sources for advanced GIS users. Specifically sources that cover programming, spatial analysis, modeling, spatial databases / data management. I use ...
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2answers
1k views
Is there a Free Aggregate Points tool out there for ArcGIS 10?
I need to do some Getis-Ord analysis but first I need to aggregate my points. I know of XToolsPro, but the aggregate points function is locked and you must purchase a license to use it. I am ...
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3answers
4k views
list all feature classes in GDB, including within feature datasets
From python how can I build a list of all feature classes in a geodatabase, including inside feature datasets? The standard example only lists FC's at the top level of the gdb:
import ...
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6answers
650 views
Has anyone experienced appreciable performance increases in ArcGIS Desktop by using a RAM Disk?
I configured a RAM disk on a Virtual PC running ArcGIS Desktop 10 and set my HKCU\Software\ESRI\Output\TempPath to a directory on the RAM disk. It’s hard to perceive any sort improvement with that ...
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6answers
597 views
Open source Cloud GIS
I'm looking for an open source cloud GIS solution.
Current situation:
Up to 100gb of data stored in file geodatabases that is updated daily. Data is used to create maps as well as geoprocessing ...
10
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2answers
574 views
Methods for optimizing multcore processing in ArcGIS
I am interested in learning methods to utilize the full extent of multicore processing power available on a desktop computer. Arc states that background geoprocessing allows the user to utilize ...
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3answers
4k views
What is the difference between FID and OID
What is the main difference between OID and FID in ESRI software?
10
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2answers
739 views
How to unit test ArcObjects with Mocking
I'm a huge fan of unit testing, but still make use of a FGDB to grab features for running unit tests against when using the ArcObjects framework.
Is anyone successfully using mocking against thinks ...
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4answers
2k views
Create Centrelines from Road Polygons
I want to create center lines from road polygons. Is there any automated tools in Arcgis or any other GIS softwares.
I am attaching the Screenshot of my vector file also.
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4answers
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Best place for (structured) ArcGIS tutorials
I've been through University for a Geography degree and am now working on a PhD in Remote Sensing. As part of my undergraduate degree I did a couple of GIS courses, but they concentrated mainly on the ...
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6answers
6k views
How do I create a convex hull in ArcGIS?
I would like to be able to create a convex hull in ArcGIS 9.x, but I can't find an appropriate tool. How does one go about creating one? I am interested in answers for all license levels, ArcView, ...
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4answers
376 views
How to manually break statement execution in python console of ArcMap
How does one break the execution of a long-running process in the python console of ArcMap?
For example, how do you break a long iteration like the one below once it is started?
for i in range(1, ...
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5answers
1k views
Recalculate full extent of FGDB feature class
I have a featureclass in an Esri file geodatabase. When I edit the features using the editor in ArcMap, and I delete most of my features and keeping only the ones in the middle, the zoom to layer ...
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4answers
636 views
Performance - using multiple file geodatabases as opposed to one
I'm trying to decide the best way to organize my data for an ArcEngine application. I am particularly interested in map display and query speed. Currently I have all of my data separated into separate ...
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5answers
2k views
What is the easiest way to copy a domain(and only the domain) between Esri geodatabases?
Sometimes I have the need to copy a domain(s) from one geodatabase to another (without the featureclass or table).
In the past, I have accomplished this in a few different ways, but each method is ...
10
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1answer
148 views
How to create an error map to support an average kernel density map?
I've created an average kernel density map by running KDEs on points stacked within the same spatial extent. For example, say we have three point shapefiles representing seedlings in three different ...
