Related to or existing within space.

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4
votes
3answers
91 views

General steps to create watershed boundary

I am a very beginner of ArcGIS. I got this CD of GIS files of a city and intend to work on watershed management. There are different file names in different formats on CD. Like .shp, .shx, .dbf, ...
3
votes
1answer
94 views

Polygon fill colour specified by column R spplot

I am trying to plot a geological map using the spplot function in R. For every unit I already assigned a specific color in the col-column of the SpatialPolygonsDataFrame. Now I would like to plot the ...
1
vote
0answers
33 views

Increasing distance tolerance in ArcGIS for Desktop?

I have road data in line format and building polygon data. I want to give the names of the road data to the building data, i want buildings to take the nearest road name irrespective of distance and ...
0
votes
0answers
117 views

Geometry datatype to latitude /Longitude MS SQL Server

I need to convert Sql Server geometry datatype to latitude /Longitude I have just imported a shapefile to my table (geometry) This query does not work:- select geom.Lat as [Latitude], ...
1
vote
0answers
24 views

R package spatstat: How to use point process model covariate as factor when pixel image values are numeric

I am trying to model a point process with an image covariate using the ppm() function in the spatstat package in R. I convert my raster to an im object for use with spatstat, and I run into a problem ...
1
vote
1answer
55 views

How to perform SQL query using .STContains in MS SQL Server

I have a table that stores polygons and a table that stores points with a value field. Both sets of data are stored using the Geometry type in MS SQL Server. I have a simple requirement - I need to ...
3
votes
2answers
52 views

Counting number of points in particular polygon for list of individuals using R?

I have distribution points for a set of individuals and a file of polygons-with matching IDs. What I would like to do is to go through and for each individual find the total number of points and the ...
0
votes
1answer
49 views

How to run spatial query get fields value of 2 layers?

Last month I ask a question "vb.net arcobjects spatial query get fields value of desired layer only", url vb.net arcobjects spatial query get fields value of desired layer only. Now there is some ...
0
votes
0answers
65 views

What is GIS for Indigenous Peoples?

I am working on a short course for a group of indigenous 10-15 year old children in a couple of weeks and want to start the program with a short intro (90s) of what GIS is and how it can help them. I ...
1
vote
0answers
29 views

Maxent output clips to minimum extent of all input variables

I am experiencing an issue with the spatial extent of my output ASC files. I am using the UK Land Cover Map (LCM) 2007 at 25 metres resolution as a categorical variable in my Maxent modelling, ...
1
vote
1answer
37 views

Spatial queries to find co-occurrences of POIs

Given a POI database containing different types of points, e.g. hospital and pharmacy, how can I select the locations where a hospital and a pharmacy are closer than a certain threshold (e.g. 1000m)? ...
2
votes
1answer
141 views

How to remove columns in a spatial polygon data frame in R?

My spatial polygon data frame (spdf) contains too many columns (variables) and I want to remove most of the columns entirely. I know how to do this with a regular data frame in R, but I am unsure how ...
3
votes
1answer
51 views

extract vertices from dbgeometry value

Who knows the elegant way to extract coordinates of polygon vertices from well known text representation of DbGeometry value? Here's my polygon for example: {POLYGON ((52.808019 -1.345367, ...
2
votes
2answers
109 views

vb.net arcobjects spatial query get fields value of desired layer only

Currently I am using ArcObjects (10.2.1) in vb.net (vs 2012). What I intent to develop is a spatial query tool. There are 2 steps in the function: (1) Use "Select Features" tool in ArcMap to select ...
1
vote
0answers
37 views

Tagging polygons within larger polygons (spatial join)

another QGIS newbie here. I have a number of smaller polygons which perfectly aggregate to a larger polygon. I want to "tag" the smaller polygons with the ID of the larger polygon they make up. ...
2
votes
1answer
62 views

How to clear spatial reference identifier?

I created a table in oracle with a sde.st_geometry column. I followed the instructions of ArcGIS help to register the table into geodatabase. My table creation statement is: create table ...
1
vote
0answers
44 views

from shape files to a database

I've previously converted simple shape files to WKT so that I can store them in RDMS that has spatial capabilities. I'm a new user to QGIS, which I'm using to browse a shape file. But now I have a ...
0
votes
0answers
37 views

Neighbours list extracted out of polygon regions

I've got a SQL database which contains some coded polygon structures. Those can be extracted as follows poly <- data.frame(sqldf("SELECT ST_astext(geometry) FROM table")) The data.frame 'poly' ...
2
votes
0answers
24 views

Cannot see the shapes in arccatalog or arcmap after creating spatial indexes

I created a spatial index on a feature class, but when i try to load it in arcmap, i cannot see the shapes. When i remove the spatial index, i can see the shapes in arcmap/arccatalog.
1
vote
1answer
81 views

Identity tool does not work as expected

I have two shapefiles. Shapefile A has five attributes and shapefile B has 20 attributes. I use the Identity tool to determine, what of shapefile A lies in shapefile B. This is how both attribute ...
0
votes
0answers
13 views

about spatial joining and getting area of attribute from each subgrid [duplicate]

I have grids of 3 x 3 sq km, i.e., 9 sq kms which I want to divide into 4 subgrids. I have already done so. I neach grid of 9 sq kms, I have digitised land cover types from Google Earth and so in the ...
0
votes
0answers
45 views

Plot coordinates and draw a heat map on a GADM map

I am trying to plot insect Resistance data collected at multiple sites on a spatial GADM map. My data looks like this: I would like to build a heat map (with increasing resistance=increasing ...
1
vote
1answer
136 views

QGIS/PostGIS: Select Counties within Region via Spatial Query

I'm using GQIS 2.2 and PostGIS on Postgresql 9.3. I have 5 regions in the contiguous United States. Each region has states, and each state has counties. I would like to think that the data I'm given ...
0
votes
1answer
65 views

Can anybody help me with Spatial Join in ArcGIS 10?

I have a doubt, I do not find what's happening. Screenshot: Using the Join (Join data from another layer based on spatial location) I have done an Spatial Join by location, and it is said that the ...
1
vote
0answers
78 views

Performing Moran Test using R? [closed]

I’m very new to R so please Bear with me: I have a set of data containing AREA Infested for each region ! and I want to know if there are any spatial autocorrelation between the regions! Here a sample ...
0
votes
0answers
40 views

glm with raster data: species decline~ ndvitrend

I have species decline data (number of population per year, over a period of 23 years) out of ndvi data for these 23 years I calculated the trend, and mapped it. now i'd like to relate the negative ...
0
votes
0answers
48 views

Sextante and qgis for hotspot analysis

I want to analyze time series data for hotspot analyis. May i know whether sextante and qgis are able to generate any spatial statistics similar to Getis-O-ord in ARCGIS.Or R is required for hotspot ...
1
vote
2answers
404 views

How to do spatial correlation between two variables on ArcGIS 10.1?

I have two datasets and I'm trying to determine the extent of their spatial relationship. I suspect they are closely related but I would like to produce a map output to illustrate this relationship. ...
2
votes
1answer
87 views

Plotting spatial data when two spatial objects have different CRS

I have a spatial polygon object and a spatial points object. The latter was created from xy latlong data vectors (called latitude and longitude, respectively) in a dataframe, while the former was ...
1
vote
1answer
308 views

How to merge/union non contiguous polygons using Oracle Spatial functions

Is there any way of merging non contiguous polygons using the SDO_AGGR_UNION or a similar dissolve function? When i run the below query in oracle sql developer i managed to convert geometry type from ...
0
votes
1answer
106 views

Getting Problem While Running Spatial ETL Tool

I have Created a spatial ETL tool to do small operations like adding an ID, updating different fields, etc. While running it from the Edit Session of Spatial ETL it runs well and good. ![enter image ...
2
votes
2answers
108 views

R - What is the purpose of .GAL lattice file?

Could someone please explain to me what the purpose of a .GAL lattice file is? I want to see if my data are spatially autocorrelated and I've been following Bivand (2013). I have loaded my polygon ...
0
votes
0answers
65 views

Resources for mapping and displaying spatial data in R

I'd like this to be a repository for all resources available specifically for mapping and displaying spatial data in R. I've seen (and contributed) to this post, but would like this post to focus ...
0
votes
1answer
181 views

Getting fail to store Polygon Shape Object in Geometry Datatype with hibernate spatial API

Tried to store Polygon shape in database with HibernateSpatial API. I have followed this tutorial to store values. I am using Mysql as my database server. So Made some couple of changes for my ...
1
vote
1answer
73 views

How to infer a relationship between two spatial points using R

I am quite new to the area of spatial statistics, but I'm very interested. For learning and demo purposes, I've created three datsets. Dataset - Persons: This describes individuals at a certain ...
3
votes
0answers
132 views

Performing cluster analysis in R with Point Datasets

I am a R-Beginner, but I want to use it for some spatial statistics. I want to check the relation between the occurrence of ill persons and the existence of water in a area of interest. To give you a ...
1
vote
1answer
195 views

Create Buffer in meters Spatialite query

I am new to Spatialite. I have following query: select A.* from linka as A, pointa as B where Contains(Buffer(B.Geometry, 100), A.Geometry) Here, A.Geometry = LINESTRING(23.2161 69.95237, ...
1
vote
2answers
139 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 ...
0
votes
0answers
91 views

Group Nearest neighbor query in SQL Server 2012 spatial database

I am looking for way to perform GNN query over road networks in SQL Server. Any pointers
1
vote
0answers
59 views

How to Create Polygon shapefile based on change in point value?

Is there a function in ArcGIS that would take analyze the adjacent point or polygon based on percent difference. If the adjacent value is within less than the percent it would dissolve otherwise ...
2
votes
1answer
132 views

Is there a limit to the amount of data in a spatial join in QGIS?

I am using Quantum GIS and trying to spatially join a point grid with polygons that are overlapping. If I get the sum of intersecting features, then I can get a good raster value. Well, every time I ...
3
votes
2answers
168 views

Fastest Way to Intersect Envelope with Multiple Feature Classes ArcObjects

I have the situation where I am doing a large number of intersections and I need to do them fast. The situation is I have a iMap with 1 or more layers and a series of envelopes, lots of envelopes. I ...
0
votes
0answers
86 views

QGIS spatial query cryptic error message

I tried running a spatial query plugin to return features in SpatialLite layer that fall within selected feature on MapInfo .TAB layer, which worked fine, selecting 3 items. But when I tried creating ...
2
votes
3answers
120 views

create diversity map of qualitative features, ArcMap

I am trying to create a map of forest type diversity with ArcMap. I have a polygon forest layer with the different forest types as attributes (e.g. 0815, 0862, 0813, ..., which stands for 'mixed ...
0
votes
0answers
110 views

Kartograph - “projection not named”

The Kartograph package looks very promising, so I have been trying play around with it. As it turns out, I have been able to get the most basic map to work (the "world.json" example), but I could not ...
1
vote
1answer
75 views

R: distance from one point to many polygons

OK so I have a spatial polygons data frame, and I have a point of interest. I want to add a row to the SPDF that contains the distance from the centroid of each polygon to this given point. How do I ...
1
vote
1answer
57 views

Spatial Duplicates & Address Duplicates

I am working on ArcGIS 10.0 and I want to SELECT (and not remove) all the spatial and address duplicates from the attribute table in a layer, either by code or in a table window or else with spatial ...
1
vote
1answer
52 views

Spatial database data representation vs. spatial programistic libraries representation [closed]

Can anyone tell me what is the difference between spatial database data representation and spatial programistic libraries representation? It is not clear to me. I have tried to google it and I can ...
5
votes
1answer
234 views

Is it possible that a good spatial index just cannot be made?

I have about 6 million rows with geography spatial features - they are all 1000 meter radius hexagons all over the US. There are a couple hundred thousand that would have been NULL, which I updated ...
0
votes
1answer
100 views

How to run a Spatial Query

I have a shapefile of a forest inventory of the uk. I want to find out the total area of woodland within a 60km radius of a specific point. I have added a layer for the point and added a 60 km buffer. ...