0
votes
0answers
8 views
Looks like a ghost polygon. Border line can not be deleted though two feature is the same layer
I'm a QGIS 1.8.0 user.
I received broken shape file.
I found one feature which has a border line within polygon.
I tried to delete line with tool;Merger, Dissolve, Node tool and etc.
I got the ...
1
vote
0answers
14 views
looking for datum to georeference maps of 19th century Maine
I am trying to georeference 3 (1840, 1844, and 1877) northern Maine maps. I really am not able to find which datum to use. Can anyone point me to a list of historic and regional datums?
thanks
0
votes
0answers
10 views
An algorithm for locating candidate labelling boxes within a polygon
Has anyone implemented this algorithm In PostGIS? Quoting from the paper:
Vector-based geographic information systems usually require annotation, such as a polygon number or attribute data, in a ...
2
votes
2answers
22 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
9 views
problem marker and popup
Displayed not correctly popup when clicking on the marker, the popup appears to the left in the corner of the screen and need to be near the token display. Help( here is my code:
var map;
var ...
1
vote
1answer
36 views
What is the formula to convert WGS84 coordinates to EPSG 2163?
I'm looking for the formula which converts wgs84 coordinates to epsg 2163. I know that QGIS can do the calculations but I need the exact formula.
Cheers!
4
votes
2answers
33 views
What are the benefits of using ArcGIS with Postgresql over simply ArcSDE?
I understand that in order to benefit from ArcGIS spatial datatypes (ST_GEOMETRY, versioned geodatabases etc.) ArcSDE needs to be installed - and with the 10.1 client it is automatically installed ...
0
votes
0answers
11 views
add map in web page from geoserver [duplicate]
I have multiple shape files of a region at different altitudes. I want them to display in map i.e. First layer is country, then states-layer and then cities layer. I only know that to do this, first ...
1
vote
1answer
19 views
Easy Custom Labeling plugin does allow to save?
I use the Easy Custom Labeling plugin chose positions of the labels and safe the layer and project for continuing later. When opening again the project, the layer opens but without any objects inside. ...
0
votes
0answers
12 views
Migrating Lines to ArcGIS polyline
I'm trying to import geometry lines from Oracle Spatial database to ArcGIS enterprise geodatabase.
and some data will cause the error.
Its says not enough points for feature class, but when I look ...
0
votes
1answer
17 views
How to select behind feature which is overlapped with the same layer on QGIS 1.8.0
My issue: I received data which was created without "Avoid intersection of new polygon". There a few overlapped feature with the same layer. I could fine overlapped feature by the spatial query. But ...
0
votes
0answers
15 views
Convert DHDN Bessel 1841 to latitude/longitude
I have a list of map coordinates, (x,y) e.g.
(526474.00000, 818507.00000)
(528517.00000, 817887.00000)
How can I convert these to latitudes and longitudes?
I tried looking at them with this ...
0
votes
1answer
19 views
Drawing on jpg-map image with proj4 (perl)
From the point of view GIS professionals this question will be sure very primitive, but please keep in mind - i'm totally newbie in this area - and this is my 1st question here.
Have several GPS ...
0
votes
1answer
19 views
value field name after raster to polygon conversion
When I perform Raster to polygon conversion using tool, sometimes it creates a field named "GRIDCODE", sometimes the field name is "grid_code". Why does it create random name of a field?
1
vote
1answer
22 views
Raster to polygon conversion's raster field takes only “Value”
Recently I am working with raster data and arcobjects.net. Here I find something new for me. And here some question arises in my mind. I tried to search some document that can satisfy my mind, but I ...
0
votes
1answer
24 views
Field added to raster data is not visible in attribute table
I am new to raster data and my background is software engineering so this might be a trivial question for GIS specialists.
Some raster files have attribute table but some do not.
On those with ...
1
vote
3answers
40 views
Can a single raster pixel hold more than one value?
I am a newbie with raster data. Maybe this is a trivial question. Can a single pixel of a raster hold more than one value?
3
votes
1answer
30 views
create grid cells of fixed dimension around a point acting as a centroid
I've been trying to solve a problem for the last few days but not having much luck. I'm hoping someone here can point me in the right direction. I'm new to ArcGIS so I hope my explanation makes ...
0
votes
0answers
10 views
Finding Leaflet Map Tiles for Rivers
I'm building a map-based web app with Leaflet that focuses on the Danube river. I'm trying to find map tiles for the river to use as an overlay in my application, but I can't seem to find any services ...
0
votes
0answers
16 views
Attribute Assistant causing ArcMap to crash
I've been having a long standing issue with ArcMap 10.1 crashing after I've loaded Attribute Assitant (AA) add-in. The process for loading the add-in is simple. I right click on the .addin file > Open ...
1
vote
1answer
20 views
I can not draw a line with a function
i'm working with GeoExt and Openlayers and HTML, i need to draw a line when user click a HTML button, i created a Function Prueba , but anything happens, if i want to add a control with my function ...
1
vote
1answer
22 views
How to publish shapefiles with GeoServer?
I have multiple shape files of my country, its states and cities. I want them to display in map i.e. First layer is country, then states-layer and then cities layer. I only know that to do this, first ...
0
votes
0answers
24 views
Getting started with development for ArcGIS Server
I'm currently working on upgrading a C# web service I wrote a couple of years ago built against ArcGIS Server to ArcGIS Server 10. The application in question does some basic spatial queries and ...
1
vote
0answers
8 views
Reshape Matrix and perform Zonal Statistics in Matlab
I have 2 grids: 1) n by m - at 100m 2) n*10 by m *10 - at 10m. These grids cover the same area.
I have to perform zonal statistics at scale of grid no.2. Cell value of grid no.1 is cumulative for ...
0
votes
1answer
26 views
Setting a scale range for labels in KML files
Is there a way for labels to be displayed in KML only when zoomed in (or out) beyond a certain scale range, just as it is possible in ArcGIS? If exporting to KML from ArcGIS, I guess the first step is ...
0
votes
1answer
11 views
Openlayers: is there any way to combine DragFeature and ModifyFeature?
I'm new to OpenLayers, and I am developing a basic editor using it. I can place different kind of icons (points) or paths (lines).
An "edit" tool is required. It is supposed to allow you to modify ...
1
vote
1answer
42 views
How to use CURRENT map document in Python tool?
I am attempting to use this code in a tool that I am working on:
mxd = arcpy.mapping.MapDocument("CURRENT")
df = arcpy.mapping.ListDataFrames(mxd)[0]
XMIN = df.extent.XMin
YMIN = df.extent.YMin
XMAX ...
1
vote
1answer
49 views
PostGIS, create line from points
I have a PostGIS table with position data of numerous vehicles and want to create lines from these points. Data can be selected by vehicle id and ordered by timestamp but how to create lines from the ...
0
votes
1answer
40 views
How to find the watershed area for each point in the river network？
As title, I want to find the watershed area, but using QGIS.
I have following files to work with：
stream network shapefile(polyline)
point shapefile clipped from the polyline shapefile
I want to ...
0
votes
0answers
19 views
Dynamic SLD styling based on min / max value in a PostGIS column
I have a PostGIS table that contains the GDP of countries together with their polygon boundaries. I am using GeoServer to display this data via OpenLayers.
When styling the data, I want to avoid ...
1
vote
0answers
10 views
django floppy forms geospatial widgets error
I'm trying to define a view that lets the user edit the data in the database, I'm using floppyforms, because of its geodjango widgets which is part of the form that i would want the user to use for ...
0
votes
1answer
21 views
Need help in ArcPy : UniqueValuesSymbology
I am using ArcGIS for Desktop 10.1 and Server 10.1 on my machine Windows 7.
I am newbie in python & running simple python script for UniqueValuesSymbology it running fine if I use mxd as ...
2
votes
1answer
39 views
Digital Elevation Model Algorithms
Can anyone suggest best Suitable Algorithm for Digital Elevation Model Generation? Currently I am working on Literature survey of DEM creation so i need to show comparison of 3-4 Algorithmic Methods ...
2
votes
1answer
32 views
Reinstall ArcGIS 10.1 after computercrash
In our student organisation we are having some issues with ArcGIS 10.1. When a computer crashes with ArcGIS 10.1 and with a valid student license for one year, is it possible to reinstall it after the ...
1
vote
1answer
11 views
Converting Mapserver default URL to a more user friendly version
I use the default MapServer URL to view the map in browser.
http://localhost/cgi-bin/mapserv?map=/home/mwh/osm-demo/basemaps/osm-google.map&mode=browse&template=openlayers&layers=all
...
2
votes
1answer
24 views
ArcMap 10.1 convert layer to CAD - clipping only desired area to send out to DWG
Is there a way to covert a layer to DWG such that only the desired area of the layer is exported out to a DWG? My issue is that the layer (parcels) contains all parcels for an entire county, so it is ...
0
votes
0answers
25 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
1answer
38 views
Geometry has incorrect latitude-longitudes
SELECT ST_SRID(geom) AS s FROM zones GROUP BY s;
returns a single record: 4326
SELECT Find_SRID('public', 'zones', 'geom');
returns 4326
SELECT AsText(geom) FROM zones
returns geometry like:
...
0
votes
1answer
18 views
How to hide/suppress and rename/alias fields when exporting to KML?
I have a feature class that needs to be exported to a KML file. I wonder if there is a way for me to export only some of the columns of the feature class's attribute table; some attributes are not ...
2
votes
2answers
20 views
Filled Polygons on the Edge of a Map - ArcMap 10.1
Today while making a map I encountered a problem with the fill from one of the displayed polygons flooding the whole map:
Notice the upper right corner where the polygon appears hollow, it should ...
-4
votes
1answer
44 views
Problem installing GDAL and fiona module in arcmap10?
I am getting message like this
Traceback (most recent call last):
File "", line 1, in
File "C:\Python26\ArcGIS10.0\lib\site-packages\gdal.py", line 2, in
from osgeo.gdal import ...
0
votes
1answer
26 views
google geocoding service combined with openlayers - not working
I'm trying to combine google's geocoding service with openlayers. So when a user types an address and hits enter, map zooms there and renders a simple point. I edited my code according to the previous ...
2
votes
2answers
40 views
Create line from two points, two different feature class
I'm attempting to automate this in ModelBuilder in ArcMap. I have one feature class with one point (Start) and one feature class with multiple points (Destinations). I want to iterate through the ...
0
votes
0answers
27 views
Is snapping working when changing from NAD83(decimal degree) to NAD83 Zone UTM 11N(meters)?
I've used the following ESRI snippet to Convert the display extents in Pixels (at the current map scale) and then return out the map units.
public System.Double ...
0
votes
0answers
15 views
Geoprocessing tool not executing when Map's SpatalReference is Web Mercartor
I am facing a strange issue when trying to execute GP service when my map's spatial-reference is Web Mercator. I appreciate all help.
I have a JavaScript API application. Initially I only had my map ...
0
votes
1answer
54 views
QGIS coordinates are very large
I've created a custom map in QGIS, with a few shapefiles. I'm using leaflet.js to render the map and the shapefile points and everything lines up correctly. The CRS is set to 4326.
When I export the ...
0
votes
0answers
14 views
Loading raster from PostGIS DB into QGIS: succeeded yesterday, fails now
I have a PostgreSQL(v.9.2)/Postgis(v.2.0.3) database which includes raster layers (added through raster2pgsql).
To open them in QGIS (v.1.8.0-Lisboa), the "Add Postgis layer" menu will not work; ...
1
vote
0answers
20 views
How does one define the empty space between lines and polygons in an ESRI BIM file?
I have an ESRI BIM file which has a substantial amount of empty, undefined space between features such as as wall boundaries, stairwells, and door spaces. In trying to manipulate this file in order ...
2
votes
1answer
23 views
Near analysis by matching attribute in two different layers
I need to perform a near analysis to assign cases in one feature class to their nearest match on an attribute in a different feature class (ex: Tutors and Tutees need to be paired by same language ...
4
votes
2answers
39 views
Is it possible to create map packages for ArcMap version 10 using 10.1?
Is it possible to create a map package in an older version? Currently I am using 10.1 and the client uses 10.0. Can you create a map package for different versions?
I see you can create layer ...
