Questions tagged [datastructure]

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2 votes
0 answers
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How to colorize hierarchically-ordered polygons?

I have to implement a solution for coloring a lot of polygons that are derived from a hierarchically-ordered dataset. The dataset can be compared to a family tree in terms of hierarchy. Most of the ...
sicadu's user avatar
  • 129
2 votes
1 answer
138 views

Range search: Identify points in intersecting circles

I am trying to identify points in two intersecting circles. The points are only in the first circle $O_1$. In many cases, the node density in the circle is not uniformly distributed. The radial node ...
Qiang Wang's user avatar
0 votes
2 answers
80 views

One data point with multiple names [closed]

I am a beginner at mapping and I am wondering how best to structure a dataset I am working on. Ideally, I would like one data point for each city on my map, but I would also like to include ...
fordham_lib's user avatar
0 votes
1 answer
210 views

Routing - How to deal with polyline with fork?

I currently work on a routing system for kayak tours. In ArcGIS I have a polyline shapefile with each polyline representing a route with a description. The problem I experience is with routes that ...
the_chimp's user avatar
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1 vote
1 answer
1k views

Fastest way to write large numpy arrays to feature class: as rows, or as columns?

I have a numpy data processing loop that repeats ~50,000x and outputs ~23 data values. I want to write this data to the attribute table of my ~50,000-point multipoint feature class. With each loop, I ...
joechoj's user avatar
  • 443
0 votes
2 answers
118 views

Diverse values to one field for soil analysis

I have soil analysis data in an Excel table. For one analysis point there are values at three depths. Besides the Excel file I also have a shapefile with the points to which I want to add the soil ...
Antoine's user avatar
  • 541
4 votes
2 answers
920 views

spatial database vs spatial datastructure?

I am building an automated system that has to process several hundred spatial queries in the form of a polygon every day. The queries have to return both spatial and nonspatial data from different ...
user9124's user avatar
  • 161
0 votes
1 answer
2k views

Export table structure information to Excel QGIS or MapInfo

I want to create a data dictionary of the tables of our primary layers. So I want a way to export the table structure to Excel. I don't need the actual data, I just want to know what columns are in ...
Johanna's user avatar
  • 1,215
3 votes
2 answers
9k views

How do I set the working directory in QGIS?

I'm learning QGIS and lovin' it. But one thing that annooys me a little is is that each time I want to save data, the default directory is the QGIS folder under Program Files. How can I set this, ...
Johanna's user avatar
  • 1,215
3 votes
3 answers
867 views

E00 file structure?

I am trying to write a java application that reads and visualizes data from E00 file. I cannot find any sources describing what is the structure of an E00 file and also what information does it ...
johnnaras's user avatar
4 votes
1 answer
730 views

Organizing ArcGIS Server File Structure?

My organization is trying to decide how to organize our file structure for services we put on our ArcGIS Server. As of now we have subfolders within the root so our structure is: http://<...
Craig's user avatar
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16 votes
5 answers
2k 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 ...
1 vote
0 answers
277 views

Tree structure for muticolored region quadtree [closed]

Is a B+ tree suitable for a multicolored region quadtree (for example, one segmenting a plot of land into several crops)? I recently purchased a copy of Samet's 'Foundations of Multidimensional and ...
bendicott's user avatar
  • 119
7 votes
5 answers
955 views

Comprehensive Intro to GIS Data Structures

I am looking for a comprehensive introduction to design and analysis of spatial data structures. If possible, please only link to online resources unless the offline resources is especially of note.
2 votes
0 answers
219 views

How exactly is an SLD_body object (when extracted from its XML href) structured when using a cElementTree to parse it?

I'm trying to export data from a PostGIS database into a geoserver and I've gotten it to where I can get the PostGIS database to point to the geoserver (I'm doing this as a python script for a GIS ...
Nightvein's user avatar
  • 145
31 votes
2 answers
5k views

Benefits of Multipart Features?

Multipart points, lines, and polygons are implemented in nearly every GIS, but what benefits, if any, do they provide? In a relational database attributes shared by different features can be stored ...
geographika's user avatar
  • 14.3k
7 votes
1 answer
516 views

Is it possible to define a No SQL model for spatial data? [duplicate]

Possible Duplicate: Is there any way I can use a Key-Value store for geospatial data? I read somewhere about No SQL being a solution for large databases management, the kind that google uses for ...
Evion's user avatar
  • 96
7 votes
5 answers
253 views

What datastructure is a good choice for objects in a map-editor?

I am planning to implement a map-editor. But I don't really know what data structure is a good choice for storing the map-object in. When the user pans (scrolls) the map, there will be much looking ...
Jonas's user avatar
  • 2,251