(1) abstract geometry; (2) storing geographic data in projected coordinates; (3) a generic ESRI term for vector features; a class for "geometry" objects.
1
vote
1answer
52 views
How to get point x and y geometry from a shapefile?
I have a shapefile of US Cities and I want to get the X and Y coordinate of EACH city in that shapefile. I've tried this:
for city in city_cursor:
geom = city.Shape
point = geom.getPart()
...
2
votes
1answer
41 views
Writing point geometry using arcpy
can someone help me fix some code that simply writes points into a featureclass. It used to work in the older gp. syntax, but I'm having difficulties rewriting it in arcpy. for ArcGIS 10.0 In ...
0
votes
1answer
11 views
How to fix buffer selection issue in ESRI ArcGIS Javascript API and LGIM applications
I had strange LGIM application behavior where the map spatial search did not highlighted the parcels within the Geometry Buffer. What could be the possible reasons?
LGIM stands for the Local ...
0
votes
0answers
18 views
How to modify the coordinates of a SHP geometry using Geotools?
I have a shapefile with some polygons. I would like to change the height for this elements using Java. The rest of the attributes should be the same. I've thought using GeoTools but I haven't found ...
1
vote
1answer
42 views
Calculating area
I have a polygon layer.
I toggled to edit mode.
I added a new column, while number (integer) and called it "area".
I then use the field calculator - geometry - $area to populate the polygon area for ...
5
votes
0answers
68 views
How to find the maximum-area-rectangle inside a convex polygon?
In this post we are looking for algorithms / ideas on how to find the maximum-area-rectangle inside a convex polygon.
In the following figure, numbers are the areas of the fitted rectangles. As shown ...
2
votes
3answers
85 views
How to test if geometry is inside another?
I need to tell whether geometries from a shapefile are inside other geometries or not.
For example, I want to test if there are trees (represented as points in trees.shp) inside the urban areas ...
1
vote
1answer
29 views
Merge Multipart Feature Line
I'd try to merge multipart feature line, but didn't work.
would you please teach me how to merge multipart feature line?
I work in version environmental and geometry network.
Regards,
3
votes
1answer
73 views
How can i topologically sort 2D triangles and put in an array?
I have a set of 2D triangles in a Geometry array which together forms a
connected strip when placed them according to edge adjacency. However, in
the array they are not in topological order based on ...
1
vote
1answer
29 views
Postgis invalid geometry from shape file
I'm having trouble converting a Feature class (shape file) to a DB table (Postgresql 8.4/Postgis 1.5). This is the command in the pg log:
INSERT INTO "public"."distritos" ("Shape" , "DEPARTAMEN" , ...
2
votes
0answers
32 views
What traits identify 2D, 2.5D, 3D geometries, and how can you convert downward, such as from 25D to 2D?
In answering this question, posed by @Burton449, I came to realize I don't have a definitive grasp on what distinguishes 2D, 2.5D, and 3D geometries. I certainly realize Z/elevation values are ...
0
votes
1answer
50 views
ST-Links convert Feature Class to DB Table error
I'm using ArcMap with the ST-Links SpatialKit Conversion tool to convert a Feature Class to a DB Table. But I'm getting an error: ERROR: 42601: type modifier is not allowed for type "geometry".
I ...
2
votes
1answer
102 views
Reading OGC geometry data from SQL server using R
I would like to write a script in R that creates a map using OGC geometry data that is stored on a Microsoft SQL server. Is there a way to read OGC geometry data using a query passed from R?
Maybe ...
2
votes
1answer
85 views
Can you explain this WKT multipolygon format?
I am confused by the output I'm getting from ogr2ogr when converting a shapefile to WKT. What I'm expecting to see is something in the form below (from Wikipedia):
MULTIPOLYGON (((40 40, 20 45, 45 ...
0
votes
2answers
92 views
Calculating area gets a different result
I've calculated the area of polygons with QGIS by using ctr-i - geometry - $area. I've set it on real. The results seem fine, but I've noticed they differ from the area given when I use the ...
