The comparison tag has no wiki summary.
0
votes
3answers
32 views
How to compare differences in two shapefiles? [duplicate]
I am a new user to Arcmap 10. I've been trying to figure out how to compare two polygon shapefiles. I need to figure out what the difference is from 2007 - 2013 (increase/decrease) in a couple of ...
2
votes
1answer
110 views
Compare two Digital Elevation Model (DEM)
I would like to know what's the best method(s) to compare two DEMs without using any GUI soft like QGIS or ArcGIS.
I'd like to do it in Python or C++, with GDAL or other similar lib.
Does calculating ...
5
votes
1answer
101 views
Comparison of three contour lines
I am looking for a way to spatially quantify the difference between three contour line shapefiles. More specifically, I have two elevation rasters which I intend to create contour lines from, but ...
8
votes
2answers
126 views
How to efficiently (programmatically) determine whether two datasets have / don't have identical content?
Given:
a geodatabase A that contains 100 datasets named a1 .. a100
a geodatabase B that contains 100 datasets named b1 .. b100
I want to programmatically (*) determine for each dataset pair (ai, ...
4
votes
1answer
60 views
Is there a tool to compare ArcGIS Desktop configuration on two pieces of hardware?
I have two PCS with ostensibly the same configuration (i.e. both ArcGIS Desktop 10.0 SP5, both 4Gb RAM) yet when I load the same file geodatabase onto both and run the same large (400 element) model ...
9
votes
2answers
84 views
Tools to compare unversioned copies of geospatial data
My office has about 100 GB of geospatial data of varying forms (imagery, feature classes in geodatabases, LIDAR, tables, etc) that have gone somewhat unmanaged for the decade during which they were ...
0
votes
0answers
145 views
What is difference between Geo BI (Geo-business Intelligence) and GIS (Geographic Information System)?
I tried finding information with difference between Geo Business Intelligence and Geo IS but unfortunately no clearly answer being found.
What is different between Geo BI and GIS and its ...
0
votes
2answers
85 views
I am looking for a list of mapping libraries? [closed]
I am looking for the top APIs that I can use to display maps from a number of map servers/sources. (like openlayers and openscales). So are there any other popular APIs for other languages than ...
3
votes
1answer
303 views
Does MySQL only support bounding boxes calculations instead of the real polygon geometry?
Within our company we are deciding which DBMS we will use to store spatial data. IT wants MySQL with the Spatial extension because there is already knowledge about handling MySQL DB. We are doing ...
5
votes
1answer
246 views
What is the Market share for open source web-GIS systems?
I would like to know the market share of 3 web-GIS systems, deegree, GeoServer, Geomajas).
Which one is more popular? Are there any evaluations regarding the market share of open source web-GIS ...
4
votes
0answers
259 views
Can Quantum GIS replace Proprietary GIS? [closed]
I’m an MSc GIS student in the final year of my studies. I’m researching for my dissertation project which is entitled ‘Can Quantum GIS replace Proprietary GIS in large organisations?’
I’m primarily ...
-3
votes
1answer
282 views
Looking for a user-friendliness & functionality comparison for ArcGIS and QGIS
what is a user-friendly (ease of use) and functionality comparison for ArcGIS and QGIS?
derived from
Which topics are fundamental for ArcGIS?
QGIS and gvSIG comparison
1
vote
0answers
180 views
ArcGIS/arcpy: Geometry object comparison methods not working. Do they take z values into account?
I have an arcpy script that makes calculations based on an input PolygonZ feature class. What I need to do in several places in the script is test whether a point falls within a polygon in 2D. In ...
2
votes
1answer
97 views
Compare workspace schemas in Modelbuilder
My model has two model parameters:
A file gdb workspace or sde workspace containing the data
An empty "template" file gdb
As the very first process in my model, I want to check if the schema of ...
3
votes
1answer
877 views
How to compare 2000 Census block group data with 2010 block group data?
I want to calculate the percent change for median household income in Los Angeles at the block group level from 2000 to 2010. Someone told me I have to reaggregate 2000 block data to 2010 block group ...
4
votes
3answers
259 views
In what data format should I export a (lat,long,alt) or (x,y,z) grid to be compatible with the largest number of GIS software?
I am new to GIS and developing an application that generates a 3D grid with (latitude, longitude, elevation) or (x, y, z) metric triplets, and I would like to add an exporting feature that ensures ...
7
votes
1answer
161 views
Looking for a trajectory similarity measure
For my final academic work I have developed a compression algorithm for GPS trajectories. I can estimate the quality of the spatio-temporal compression by computing the syncronized euclidean distance ...
7
votes
5answers
3k views
Comparison of Open Source Desktop GIS Packages
I'm curious as to what comparisons are out there between different Open Source Desktop GIS software packages. I'm aware that there has been a QGIS and gvSIG comparison on this site but I am looking ...
1
vote
0answers
183 views
Manifold 'Link drawing to query' - can I do this in QGIS?
Manifold GIS allows the creation of dynamic drawings linked to queries.
Unfortunately I do not have access to Manifold as my employer refuses to pay for it, so am currently investigating ...
0
votes
1answer
139 views
Is the Heatmap Colorramp uniform across different rasters for ArcGIS?
SO i have about 16 rasters spanning the same extent and containing the same variable.
I use the display symbology in ArcGIS to generate a stretched Color Ramp which is the heatmap i want.
As the ...
3
votes
2answers
554 views
Basic .NET mapping components?
Which .NET mapping components are currently available? Focus is on desktop use and fairly basic mapping of SHP files (thematics etc.), not the more advanced GIS functionality (reprojections, clipping, ...
8
votes
2answers
1k views
What are the pros and cons of using the ArcGIS Viewer for Flex vs. creating your own GIS application vs creating your own framework?
Simple question, but perhaps hard to answer. I have broken the title question into three distinct questions in order to clearly identify what we are considering for options each time we build an GIS ...
6
votes
2answers
587 views
PostGIS feature compare function?
I would like to be able to compare features in Layer 1 (source) to features in Layer 2 (updates to source) in order to see if any of the features geometry and/or attributes have changed. I would also ...
6
votes
3answers
322 views
Comparing 2 vector files
I'm looking for a tool which compares two vector files (eg shapefiles). Eg 2 versions of a river network.
Quite a lot of the records are equal, but some are different. A possible output would be eg a ...
