The act or process of planning or writing a computer program.
7
votes
7answers
219 views
What programming languages are used by different GIS platforms?
Suppose a programmer has no knowledge of GIS, but wants to leverage his/her programming skills to get into GIS. Please list different GIS platforms, packages, etc. that use a particular language.
(I ...
0
votes
0answers
26 views
What is the easiest way to calculate borehole deviation?
Does anyone know if there was a program or specific method (calculations) in order to create a deviation value based on querying specific geological and drilling variables?
1
vote
2answers
74 views
How to add a polygon from GeoJson into Leaflet?
I try to use the following function to add polygons to my Leaflet map.
function polygon(geojson)
{
alert(geojson); // alert for testing
layer = L.geoJson(geojson);
layer.addTo(map);
}
...
7
votes
1answer
128 views
Instructor led Web mapping development courses?
Hey guys I have been messing around with programing for a while now and have gotten proficient with Python and have some interest in HTML 5 and Javascript. I have recently received a request for an ...
4
votes
1answer
91 views
Learning resources for beginning differential topology for a programmer?
With this question I'm looking for suggestions about how and where to start learning differential topology starting from a good base of linear algebra and geometry, also consider that this know-how is ...
2
votes
0answers
61 views
Custom python datasource to QGIS
I'm working on a homebrew spatial feature data format, and using Python to write it's API.
It occoured to me that use some tool like QGIS to display my data would be very nice to have, for debug/test ...
5
votes
1answer
116 views
Grid Analysis from samples data
I'm trying to analyze set of samples into vector grids in order to generate average data in corresponding grid.I'm working with 50m separated grids but the size of grid may change over time.That's why ...
2
votes
1answer
47 views
Should I use thread lock when implementing Enabled void in ArcGis Command?
I've noticed that that ArcGis Commands are activated asynchronously. So I supposed that there is a chance to corrupt memory without using thread locks when overriding Enabled void of custom ArcGis ...
2
votes
1answer
31 views
Is it better to define object properties or layer properties?
I have a question, but it is difficult to phrase. I am picking up GIS methods as I go, and I have run into this problem frequently. Please excuse me if I am in the wrong place.
When organizing ...
1
vote
1answer
33 views
Prompting Dialogue Box to Have User Enter Information? Without ArcGIS Engine maybe?
Working with the ArcGIS family v10.1 on Windows 7.
So, I have this vision for a GIS project that does the following:
User opens up ArcGIS Explorer (ideally) or ArcMap (still fine), or I guess even ...
1
vote
1answer
87 views
Undefined reference errors installing GRASS addon
I am trying to install the r.geomorphons GRASS addon (available from http://sil.uc.edu/pdfFiles/jarek/r.geom.zip) in GRASS. I tried on Windows but gave up and decided the best thing to do was to try ...
5
votes
2answers
592 views
Generating GeoJSON with Python
Hi I want to programatically create a GeoJSON file using polygons from a shapefile but adding attributes from my own application.
This is easily done for a shapefile:
def ...
2
votes
2answers
125 views
Insert a loading message into DataGrid
I'd like to show a loading message (Loading...) that shows while the datagrid is being populated.
It would show when the search button is clicked and disappear when the grid results have populated.
...
7
votes
3answers
396 views
Map Application Requires Refresh to Initialize
I tried this question over on StackOverflow but didn't get any answers. Hoping you all might be able to help.
Creating a web mapping application in Javascript/Dojo:
When I load the app in a browser ...
0
votes
0answers
88 views
GIS Programmer/Developer [duplicate]
I have already used Quantum GIS and ArcGIS for quite some time now and I think I'm already knowledgable in using it. Now, I want to learn GIS programming and developing (scripts, python). Can anyone ...
2
votes
2answers
262 views
[R]Function to calculate mean for missing or NA values in a dataframe
I am trying to develop a function that will calculate a mean lat/long for my missing or zeros location (lat/long) data in my dataset.
I have locations for many SETS within the same TRIP, which tends ...
1
vote
0answers
47 views
Delphi coders: what features should a GIS d/b interface VCL component have?
If someone were to implement a VCL component to interface Delphi applciations with GIS databases such as PostGIS and Spatiallite, what features and functionality would be "must have" and "nice to ...
3
votes
1answer
348 views
How to programatically populate a shapefile field with polygon areas in OGR?
I'm trying to programatically populate a shp field with polygon areas:
import sys
import ogr
ds = ogr.Open( 'tttttttttt.shp', update = 1 )
if ds is None:
print "Open failed./n"
sys.exit( 1 ...
3
votes
1answer
306 views
Calculate bounding box + buffer for rendering a map tile with mapnik library
Mapnik library has a Projection object (I'm using Python bindings):
spherical_mercator = '+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null ...
4
votes
1answer
463 views
merge selected features and programming
I have a shape file with UK districts and unitary authorities. In the past, using commuting patterns, I worked out a new geography which is close to travel to work areas.
I now would like to create a ...
1
vote
2answers
1k views
Some Help to select some features from a vector layer
I have a vector layer (kml) that has some point with scientific name of plants and animals, some description of the place where the people saw them and the coordinates.
Basically the table associated ...
6
votes
1answer
80 views
Phenological event extraction in IDL
I’m doing phenological study using threshold method in IDL. I have a twelve-band image in 2005 (format is in .tiff not ENVI format). Twelve-band means that monthly images (Jan to Dec) have been ...
4
votes
1answer
184 views
Finding intersection density for weighted lines connecting points across the continental USA
I'm working on an one-time problem that I'm hoping to solve with a computer program using free GIS libraries (preferably for VB.Net, C#, or Python... Java or C/C++ could work too). Alternatively, I ...
4
votes
3answers
241 views
What types of GIS problems does functional programming address?
After reading @ray vernagus post about using ArcObjects with F#, I have been wondering ... what types of GIS problems are better handled by Functional Programming, as opposed to more traditional forms ...
0
votes
1answer
328 views
GIS learning resources for a .NET developer
There are couple of questions which are related to learning GIS or GIS skill sets here but I would like to ask very specific question.
My current skills: I don't claim that I am a good programmer ...
7
votes
2answers
301 views
Is it a bad idea to hold references to ArcObjects inside business classes?
According to best practices is it a bad idea to cache features and geometries inside business objects? If it is bad, what is the alternative way?
References to features may be replaced with their ...
4
votes
0answers
191 views
How to convert a set of points to a solid object?
I have a data generated as the output of some numerical processes. I need them to be converted into 3D solid objects (as CAD solid format) to make them importable for some particular numerical ...
7
votes
1answer
117 views
Using Google Maps to track work per building and allowing users to manipulate that data
I work part time for a political campaign office, who are going door-to-door for several months at a time, all over a city. We need a system to track where we have been, and how long ago we were last ...
2
votes
2answers
216 views
flex to java trying to get started on the plan
I have as suggested recently on this forum been "playing" with arcgis server. For reasons perhaps not obvious to "real" programmers I have built a fairly extensive series of web mapping applications ...
6
votes
3answers
203 views
What is the more accepted practice for defining tolerance values?
The Context
Due to restrictions, I have an application that requires line features to be selected if they are within a user defined tolerance from a points data set. I can not currently use any third ...
2
votes
1answer
111 views
Locate DTEDs from one layer that intersect a polygon in another layer
I'm new to the GIS world, and using ArcGIS 10, so please forgive me if this is a simple question. I have DTED files (level 2) that I have placed into a mosaic dataset, and I'm trying to determine ...
3
votes
1answer
149 views
Self-Sizing Labels
I have labels now in my application that work fine using the usual ILabelEngineLayerProperties2. When I set them up I set the .Expression property and using the .Symbol property I set the font, style, ...
3
votes
1answer
264 views
Georeferencing multiple rasters to World files
I've got exactly 56 tiffs to georeference. Each raster has its unique TFW world file. I'd like to automate this process. Each raster has it's unique name which is consistent with world file name (eg. ...
8
votes
6answers
1k views
What are the advantages of using Rails for a GIS/mapping application?
I've heard some good things about Rails, but I don't know much about it yet. There are only a few questions about Rails on GIS.SE (and there's not even a Rails tag).
Is it worthwhile to learn about ...
6
votes
3answers
564 views
Add map making to java desktop software
In my project (a desktop application) I need to create a map with three layers, basic geographic layer at the bottom, a GSM coverage area layer on top of it, and then a location based services layer ...
18
votes
5answers
823 views
Looking for a developer-friendly web gis
I'm a recent Computer Science graduate who prides himself in his knowledge of software development and problem solving, but has no idea how gis systems work.
(Read: I'm a programmer)
I've been ...
0
votes
1answer
124 views
Where to get raster files of Earth, united states [duplicate]
Possible Duplicate:
Open access repository of general GIS spatial data?
I'm brand new to GIS programming so please excuse my lack of knowledge.
I am developing a GIS web app using ...
5
votes
1answer
291 views
Combined area of all features within features of another layer
I have a grid shapefile (basically, a half-degree grid of the world, where each cell has a unique id number), and a set of files with features. I want to record for each grid cell, all the areas ...
2
votes
1answer
176 views
Automatic updates to OpenLayers code
I have my map code in openlayers JS. My input data is in a text file and I am able to render the points on the map. I have to give the user a right to create a layer by entering the data in a form. ...
1
vote
2answers
353 views
ArcGIS COM API Error
i am using the arcGIS api to make a plugin for arcFM, when i try to run this code
Type t = Type.GetTypeFromProgID("esriFramework.AppRef");
System.Object obj = ...
6
votes
4answers
2k views
Compiling Python Scripts That Use ArcGIS Geoprocessing Tools
I've been coding with Python for several months now and have developed some reasonably complex scripts for primarily geoprocessing tasks. That being said, I'm still learning a lot as I'm coming from a ...
1
vote
2answers
1k views
How do I programmatically update/recreate an ArcSDE feature class from external sql data?
I have an ArcSDE feature class that contains project points based on xy data from an external SQL databaes. (Not a geodb). I am looking for the best way to "recreate" the ArcSDE feature class from the ...
8
votes
4answers
719 views
Flood modelling insights
I am trying to create a flood modelling system. The system consists of two parts mainly a river flooding simulation and rainfall simulation. To do this I am running the latest version of GRASS 6.4. ...
4
votes
2answers
3k views
Basic proj4 conversion UTM grid -> longlat and back
I'm a GIS novice, and am struggling to understand how to drive proj4 to accomplish what seems like a simple thing. I've googled for a couple of days, but everything I find seems to presuppose quite ...
29
votes
11answers
3k views
What are the best resources for learning GIS programming with Python?
In your opinion, what is the best book/site to learn Python with GIS goals in mind?
By "best", I mean:
not very long (book)
easy to understand (book/site)
good practical examples (book/site)
7
votes
6answers
3k views
Visual Studio 2008 vs 2010 for ArcGIS 10
Is there any differences, pros or cons between the two? I am going to buy Visual Studio and just want to be sure which one will work the best and have the most support going forward. I I am guessing ...
7
votes
4answers
486 views
Newbie to GIS Development
Greetings everyone, I am new to GIS development and was wondering if there are tutorials available for development in ArcGIS 10. I have some experience writing simple scripts in python and fooling ...
7
votes
3answers
622 views
Looking for a basic PostGIS viewer to use as basis for own application
I'm looking for a rather basic PostGIS viewer. It should be possible to pan, zoom and retrieve coordinate information on mouse click. No need to support coordinate transformations. It should introduce ...
0
votes
1answer
332 views
Create moving map application from topographic maps
I'm trying to create a moving map application for an embedded ATOM device. Data source is a 400MB tif file (500dpi) plus projection and worldfile. My naive approach was to load that tiff into Global ...
5
votes
1answer
4k views
ArcMap field calculator VBA question
I am trying to use ArcMap's Field Calculator to populate values in a column based on a value in another column. So, in pseudo-code:
if [field1] = 'Foo'
set [field2] = 'Bar'
endif
Something like ...
